if you were going to make them missiles id give them logic like
if they login and see x grabs by y player since their last login and they have a missile on hand they shoot a missile
but if they make a missile while running turns they lose the aggro and dont hold a grudge, then you bring back the old bottom feeding of diffusing people you farm
and create a situation where you can spread your grabs if you want to take less risks
anyway simpler things are
try a bot which goes 100% turrets and weapons tech to boost its defence when its cheaper than more turrets, and allies with other bots if that is possible, best tried when starting a new set for real but no reason not to see how they went mid set
try a bot which doesnt explore every time it needs to, perhaps make it random between cashing and exploring would be the easiest option in your logic, then you can adjust the percentages to make it explore more or less
im not sure how you startup the bots, i presume you run something like the ffa auto starts, perhaps the 97 cs one
theres nothing wrong with a pure cs start, particularly with tag protection but having some of the bots start a lot faster would be interesting, its seemed to be more of an issue since you changed bpt from 50 to 70 as well
is it possible to do something like limit max bpt by turn/day, i use eestats and earthgraphs to get what day of the set it is but you could just get that off
http://www.earthempires.com/alliance/main or use turns from advisor since how they play could be based solely on their turns run
then you could have some begin building with as few as 20 bpt, i wouldnt go lower than that, and get high production and military early
i also like the idea of starting some of the countries gradually, a couple a day or whatever
when you first brought the bots in i thought they were being started every 10 human made countries but might have been wrong on that