This would take construction of new planetside yeerk pools (which you can't do because you don't have spare kandrona generators), mass abduction by ship (which would have to be done in small groups that could be held inside the ships), or camps to hold prisoners (which would require some ground troops, of which you have few, and would be visible).
Ground camps are highly plausible due to the Yeerks holographic projections and stealth technology. Just set one up in an obscure, remote part of Africa.
With what ships, construction materials, and personnel? Also, I could be wrong on this one, but I don't recall the books ever mentioning what the yeerk ships used as fuel. How do you know that you can extract it from the gas giants?
The Yeerks in the Hork Bajir Chronicles managed to mine, starting with nothing but a few fighters and skrit-na ships. Surely so can I. Using human mining equipment and human hosts inside of a projected force field to keep out the vacuum. As for the fuel, I was perhaps going a bit on assumption.
The idea behind this one makes sense, but the execution isn't practical. A significant number of nuclear weapons are on board submarines, which wouldn't be able to be touched by dracon beams. Handheld beams malfunctioned in dense atmosphere; I doubt any dracon beam could be fired underwater, and their energy would be absorbed by water before reaching most subs. That's assuming that they could locate and keep track of the subs after the attack began.
You also have a lot of fighters attacking installations simultaneously. How many fighters do you have? I'd estimate around 25 are in the Sol system. You also have to consider that during peacetime, most of the U.S. armed forces aren't activated. They wouldn't be at military installations. It's a small portion of the world's military, but I'd like to think it's one of the more dangerous parts (I'm a little biased in this case).
Megamorphs 4 shows Bug fighters having both underwater capability and firing dracon beams underwater. But yes, I considered the fact many nukes are on submarines. However they too would be being tracked the US Navy, which the Yeerks could hack. They would eventually have to surface or at least get close to the surface, and that's when they would be destroyed.
A Yeerk Pool Ship has a compliment of around fifty bug fighters I believe, and two would definitely be enough to wreck most military bases. Strongholds particularly troublesome could be destroyed by the bladeship if need be. Keep in mind with communications down they wouldn't really be capable of staying in touch or even warning one another about the attacks. Comms satellites can be shot down, radios jammed, and mostly any other electronics can be hit with EMPs.And while most of the military would be on standby, their bases and equipment would be there. Pilots are no use when the airbase has been destroyed.
This makes perfect sense... except you will be waiting until there is a U.N. summit meeting.
Better to be patient than to botch an attack.
You just released an uncontrolled, self-replicating weapon. Do you realize how dangerous that is? I'll get to feasibility of designing it to target specific people in a minute. For now, let's assume that you can. It will go through many generations before it finishes its job. It will have plenty of opportunities to mutate, and because once it's released you no longer have control over it, you can't correct for these mutations. There's a very good chance it can mutate to attack people you didn't intend for it to attack. Given that Ebola virus has an 80% lethality rate, this will be devastating to the goal of getting hosts.
Fair enough, I was half-asleep when I wrote it all anyway.
Now for the feasibility, you have tens of thousands of yeerks on the planet to begin with. What percentage could you reasonably assume are scientists? What percentage of those scientists could you reasonably assume are biologists? How many of those could you reasonably assume study diseases? Do you see where I'm going with this?
If I was a Visser setting out to conquer a species and their planet, I would be sure to bring a good science team that covers all fields plus computers capable of doing just that.
That's would require a lot of resources and time to accomplish. You'd have to build facilities to produce the kandrona generators and shield generators. Then you would have to actually build them. Until then, you wouldn't have those kandrona or shield generators.
Ah, but time before the invasion would have been spent creating said shield generators and kandrona's. In addition I would have several kandrona's before hand with me on the pool ship, if I'm taking over a planet a couple kandrona's seems like common sense to bring.
Your biggest problem: time. It takes a very long time to establish a good infrastructure for constructing ships. The andalites will attack if they get wind of an overt invasion.
Keep in mind that the Andalites consider Earth a rather low priority, I would at least three years to do this. in addition I would likely have much more time since the Animorphs would have never ended up warning the Andalites to any extent like they did in the books.
And since the Andalites idea of an overwhelming rescue force seems to be about three domeships, I think constructing just four bladeships and some bug fighters is well-within my reach.
You don't have the yeerks to take that many hosts initially, or the facilities to support that many.
Point there. But I could still have several hundred thousand to be quite sure. Facilities already exist on Earth to support the population.
Dracon beams are particle beams, not lasers. They don't actually travel at the speed of light. And trust me, aiming is still a big issue. 50 m isn't far enough to have much of an effect of bullet drop, but see how many people can hit a target at 50 m with a pistol.
True there, but they still travel far fasted than bullets. Unless they were badly made dracon beams, I do not see what could effect the aim of the user except just keeping the gun steady which could be majorly helped by modifying the dracon beams into rifle-versions. Unlike the bullet, the beam will travel in a very near if not complete straight line. Just aim and shoot.
You're using Gleet biofilters to keep humans out of entrances that human controllers are passing through. Think about that for a second.
It obviously detects both human and Yeerk DNA, otherwise Ax would have told the Ani's they just had to walk through the door to the Pool and then morph.
The yeerk's doctrine seems to be similar to USSR doctrine (which doesn't make sense since they don't have the numbers for it).
Even the USSR trained its soldiers to operate in units, maybe not like the Americans, but they still did. And if I saw it fit, I could implement more training for soldiers in the wait prior to the invasion.
Ahh, the part that set off my little tirade, you're saying that because you say so, it will happen? I don't have words to describe just what I think about that....
No, I'm saying so because if I was in charge of leading an invading army I would NOT send my limited soldiers into battle with god-awful aim.
Sorry I never made my invasion plan clear enough, I was too tired to write it down.
Prior to all of this my task force arrived in the Sol system. Upon this we would enter an extreme-long range orbit, waiting and building up. Keeping a very low profile, taking a few thousand human controllers as we went. Mining resources in the asteroid belt, constructing what we needed slowly and surely. Once the forces have been built up, we launch pinpoint strikes in pressure points globally. Hitting humanity where it hurts and hitting them hard.
So either you're ignoring the books, in which case you might as well do whatever you want anyway since you're rewriting all of the rules of the scenario, or you're developing new doctrine, training all of your forces in the new doctrine, expecting them to move straight into it without any difficulty in adjusting, and doing it over precisely zero time.
I'm just going by the rules. I am a Yeerk Visser, and I attained my rank through tactical abilities. I feel the pressure of the Council on me, I cannot and will not fail. I will take whatever precautions I need, as long as I am ultimately successful.
I believe a bug fighter was disabled by a handheld dracon beam in the last Megamorphs book. I'll give you that the max firepower on the dracon beams varies through the series, having a range of as much firepower as a low caliber handgun to a stinger missile.
I recall no such event. I know the settings change in the books due to ten or so power settings on the dracon beam. I presume they would use a medium setting most of the time to save the battery.