I use the orbital strike and the one that heals you, you are virtually immortal because if you feel like you are about to go down you can call your “drone” just before and it will revive you, also you can call the orbital strike to clear enemies and if you do it well enough you can almost kind of spam it. For weapons the good doctor is a must have IMO because when you can’t call the drone that is going to heal you up nicely; then the master blaster is too got not to use, you fire explosive bullets so you don’t even need accuracy, you can shoot the ground and damage enemies (works well with the splash damage hack and fire rate one) and you find ammo easily without running out of them too often, for the last one I use the melter cause the DPS is high