The only multi purpose plier I've used (and I've owned a lot) that was worth salt is a pair of full size Ideal needlenose with a #12 stripper built into the cutting jaws. It's been around since the 1970s.
No multi use pliers can take the place of the separate tools. As JBD said any twisting on the needlenose part of strippers throws the whole thing out of whack.
As for strippers I've had both T5s and Klein's version of the T5.
I've had problems with the blue handled ergo version of Kleins. After a little use, they don't close all the way, almost but not quite. I currently use the Ideal version the Super T-Reflex like Reno posted. It has a stripper for #8, as opposed to the others with the largest size being #10, and I'm very happy with it.
I have an EMT reamer on the base of a big square shanked screwdriver. If doing rigid, I'll put a Unibit in my cordless drill to ream it. I've owned the "working with conduit" pliers posted. It didn't have enough leverage to the jaws to be worth much.
I carry a pair of dedicated to crimping crimpers
