You should always try to have as many different lifeforms on your account as possible. So make 1 planet with Rocktal, 1 with Mecha, 1 with Kaelesh and 1 with Human. Repeat on your other planets.
Only pick Human on your expo planet. Only pick Rocktal on your mining planet. Only pick Mecha on your raiding planet. And only pick Kaelesh on your small planets.
Hope this helps 
I've been having this debate with people the past few weeks people seem to be split on the subject, simple question, lets make it as a poll just answer with "A" or "B":
If you have 3 planets with Mechas LifeForm that has 10% research for Expo Ress and on every planet and 10% building research bonus which would be added on as a 0.1% to the additional research in this situation, which sums it up to 10,1%.
My question is if you are sending Expos from only one planet, do you have:
A) 30,1% Expo ress bonusB) 30,3% Expo ress bonus
C) 33% Expo ress bonus
I don't know if this mechanic of the game is still valid, but it used to be that the Maximum Expedition Fleets that you can send from 1 planet is 4 then slot 16 resets itself (I cannot remember time taken for reset)
Can any of you remember this ?
