Non Positional attacks? And a Divine Avalanche question

What is an example of a non Positional attack? Also, if you're soft capped to melee and lethal defense, does Divine Avalanche help out beyond that?

I don't know an example, but quite a few psionic attacks are non-positional. Fight Malaise, for instance, with a Super Reflexes with soft-capped defense. It isn't pretty.

If you're soft-capped to melee and lethal already, Divine Avalanche would only be situational - incarnate trials, tip mission devouring earth, pets, suffering from defense debuffs (depends on secondary), and so on.

When softcapped, DA helps against (A) defense debuffs, (B) enemy tohit buff, (C) higher base tohit of incarnate mobs.

As for non-positional attacks, examples of such attacks that players have access to would be blind from illusion control, plus every single power from mind control (they are typed solely as psionic_attack). Additionally, singularity's attacks are untyped and non-positional both, so they ignore both typed *and* positional defense (basically everything but insps and PFF). And mobs using these powers also benefit from this, hence SR having a 'non-positional psi' hole (really it has a 'non-positional' hole, but basically all of that is psi).