I use berserker fury when I'm approaching a large group in MM or xdef. Doesn't really come into play during boss fights. Most of your fury should be going towards eviscerate and Brutal slash, so you're doing it right. Berserker Fury is just a preference, on my part.
Good call on the 1 pt in rending sweep. Until recently I had a grant from a cosmic, so I missed putting it down here. Often times, RS won't be necessary in a group, but it doesn't hurt to have 1 pt here for solo work.
I went with Excalibur for my legendary. Not only is it great for Wolverine, but I really wanted to put it on SOMEBODY after the disappointment of its infeasibility w/ Nightcrawler.
Moved a few points around to follow a guildie's recommendation. Also removed all earlier notes, as they were to old to useful in any context.
Gear
art- replace xerogen crystal w/ adv. kung fu training sequence.
uru- use either melee (gotta use em on somebody) or defense, but ancient grove is the optimal runeword here
5 primary slots- Not as gear focused as many other chars. Look for high grants on your one pointers: , & . Other than that, look for the dmg rating and crit rating over brutal strike. You'll still get your brutals in, don't worry; save gear focus for +health and +dmg rating.
Uniques: Use what ya got and don't sweat it. I'm enjoying symbiote infestation, but that is my ONLY unique I'm running on him.