So right now I'm just building my pistols/willpower Sentinel by the seat of my pants. I mean, neither power set was even a thing when I last played. I have a couple or 10 other heroes as well. A lot has changed and I don't remember half of what I DID know. So these questions aren't specific to a build, but more general.
Pool powers:
The fitness pool is inherent now, woot. But I also have the quick recovery power in willpower. Quick recovery seems better than Stamina, but are there diminishing returns on slotting? For example, would I get more out of 6-slotting quick recovery, or 3 QR and 3 Stamina? Math is hard. Is there a formula for "most efficient?"
Regardless of the answer to that question, I don't like running out of endurance. I'm looking at you Freak Show. So overkill might be in order, but there's overkill and then there's overkill. How much is too much? Or is there such a thing?
Leadership:
I completely forget how I used to slot those powers. Is there a general rule of thumb? How much is considered "enough?" I don't like to miss either. I'm looking at you Circle of Thorns.
Then there seems to be some new stuff where you can take attack powers from a pool? People talking about Fire/Time/Dark corruptors and stuff and I'm clueless. I'm not familiar with that at all.
Right now I'm just going with what I know, which is probably stupid, but I'm slotting SO enhancements at level 33 and hope to figure out all the new stuff by level 50.