Solid point there. I like to level my characters the old fashion way rather than theory crafting them for "already at 50", so yeah, I wouldn't be six-slotting procs into anything, I hate missing. Like GM Kal and Six-Six suggested, I'd want to get the basic Acc/Dam at reasonable levels via frankenslotting or maybe a few pieces from one well-chosen set (such as a set that one of the procs is already a member of) before gorging on procs.
1) Anything attack that has "superior damage" is probably a a major power, so unless I slot a single poroc or two at most for some helpful effect like Chance For Recharge, maybe I shouldn't bother if you're right.
2) Betty's Logic???