I've had decent luck with Integy parts, but I only race, no bashing. I was looking through the list, some of the things they said work didn't for me, and things they said didn't, worked for me well. I think the issue with Integy is, and always has been, consistency. I supposed some items like their tires/shocks/clutches are things they can't generally screw up.
I will say the parts for the Slash seem vastly stronger than what I have on my Tmaxx though. For bashing I think the Slash bulkheads and shock towers look pretty indestructible, just make sure the arms are plastic. My Slash is a drag racer, and I wanted weight and no flexing, so it's 100% metal, and presumably a wreck at 60mph isn't going to matter what you have, it's gonna hurt either way, lol.