As been said a dozen times, this will most likely never happen.
We play some average wastelanders, not some uber technicians.
Not even the Chosen One was able to find more then one functionating robot.
In the entire game of FO2 (not even counting FO1) there weren't that many people with a personal robot.
LOL
An army in Sierra, Enclave, Navarro, SF doctor, NCR doctor, robots you saw in Klamath and other mines, Gecko robot, Klamanth robot and in some vault I forgot the name :e
The chosen one was able to fix a brain to get his own robot in Sierra, was able to hack the computers to unlock the gates of the slaves in NCR, fixed the computer with a voice modulator module bought from Renesco, spoke with computer in SF.
Dont tell me this all electronics, in vaults, personal robots, doctors robodogs, mining robots and powerplant robot is nothing, and it wasnt anything special in F1/F2. As for the things I described here there should be plenty of robots scattered somewhere in the wastes.
Average wastelanders, right......then why all of a sudden devs added gatling laser in encounters.... woops, its something you used very often or was it of a big importance? Not really... it was even less used than robots.
I dont aggree with robot encounters. Simply they didnt travel across the wasteland for some mission.
I believe, robots could be found in a vault encounter, guarding some place. However I dont see a place they could be particularly found in
Vaults are everywhere but not like millions of them. Hmm, thats why I wouldnt go for encounter either. Id simply buy them from some robo maniacs npcs who gathered them and are selling to average wastelanders.
However the choice should be limited,
eyebot, robodog, mr Handy and the ones that were weilding a weapon in Sierra (small guns only!)
Or even without the last one, its not about making an army, that way, there would be HtH robots, based on your INT but different to what other have said:
1) min 6 INT and 1 robot takes 2 INT and 2CHA so it wouldnt make any army chill down; OR
2) min 6 INT and 1 robot takes 2 INT
of course there should be a level of science to use (maybe - creation of your robot in Fonline?) mr Handy, 60%, Eyebot 80%, robodog - 120%. One more thing - science would improve dmg? OR they could be crafted... whatever... based on percentage above and MP, EP and maybe some MFC or w/e
Robots would be good for hunting purposes >> As they're metal they would be a bit resistant to bullets, main weakness being EW
Fuel? I guess not, while they're not weilding any weapon, there shouldnt be any fuel req.
As for TC use, they would encourage EW usage, but for that we would need some better EW availability ...