Shrouded FO´s, Hackers and Dr Worm aka Mechanoid Drone are nice specilaists for SEF. Add a solo Seed Soldier to act as emergency rescue for the Doc or backline mission solving. On the offensive front Noctifiers are good. A Suprise attacking (=attacking out of TO Camo) will kill even a Marksmanship Lvl 2 boosted Reaktion Zond. For cheerleading (cheap guys adding orders to the pool) Ikadrones are good as they also are Baggage (bonus Points holding ground) and can Intuitive attack (shooting camo markers) all on the cheap. There are a number of directions to go with SEF, but that´s a skinny on some nice starting Points.