as above upgrade all iris drones and shields... also you want to smash kappa gate as much as possible for LF4 , Hercules drone design ( gives 10% shield strength on every drone )
also gives you a multi booster but thats not really important. If you complete Epilsion Gate 1st time you get a LF4. Then i would just switch it between pallying and getting uri.
I would advise to to invest in a pally bot ( openstealth £5.50 ) this will also complete your gates for you.
Anymore questions on this topic or anything feel free to message me :)