Insight said:
I think the feat you want is Power Attack. All-Out Attack only boosts your attack roll, not the Save DC of your powers.
In terms of affecting incorporeal, Mind Control would work just fine, as long as it's at least ranged.
Ok, in that case, if some other interaction indicates that they are not entirely incorporeal, I will use the SAW plan, with Full All-Out Attack but no Power Attack (I have Autofire 3 on my SAW, remember...I'm not going to get greedy...I can only get more damage out of Power Attack if I hit by more than 10, and at that point its already +20 damage...although for all I know they are sitting ducks thanks to invis)
If there is evidence that they are truly incorporeal, I will go invisible, try to Mind Control one of them, order it to attack the others, then take a five foot step to change positions. Unless I have reason to believe they can see through my invis, I am going to AC/DC my Mind Control for 5.
(Oh, and the weapons fire doesn't necessarily echo throughout the battlefield. The gun-like FX on my blasts are technically produced by the light and sound implants, so they don't occur when I have visual and audio concealment on. The bullet-like energy packets may or may not make their own noise. Surely they do when they impact whatever they hit, though, whether that be baddies or scenery.)
Also, regardless of what else I do in this situation, fly is my movement mode, even if I am only a few inches above the ground. Surge knows that some enemies has ground-based vibration sense, and he'd rather not take unnecessary chances.