I got through OG1 with just the pilots who had Support naturally and didn't notice the lack, for the most part. I don't think I could really get through it without SP Regen, tho (at least, not get through it and still have my non-broken pilots survive.) Being able to spam Focus/Strike/Alert as appropriate makes life so much easier, especially for my favored tactic of flinging one pilot way out into the enemy mobs and letting them bash themselves to death on counterstrikes (cheap high-ammo weapons also help a lot there. Hello, M95.)