Nice, that sounds like a pretty good build! I really like that signature, too. It just mows down crowds and is even pretty good for bosses, too. And you can move while using it, which is a nice bonus. When I get to 60, I'll really have to see what kinda build I wanna run with all the power points I'll have then. I got a bunch of Odin Marks ready to bless 4 artifacts and get a legendary for her, and I got some unique boxes ready to be used, too. I've gotten her X-Treme X-Men bodysuit to drop so far, but that's the only unique I got so far. Yeah, Widow's movement power is cool for the stealth. You can get a teleport from Kirigi the Undying, too (the generic ninja mini-boss who teams with Elektra in X-Defense).
Wow, sounds like all that raiding has helped you get your Iron Man really strong. I still haven't done any raiding, so I don't have any of the slots at 66, though I got 4 blessings and a legendary for my Widow as my main hero still. Cosmics are a piece of cake with her, though there's a bit of room to get stronger with the level 66 gear now, not to mention the cybernetics upgrades and omega points.