Claws damage can be resisted to the point of feeling like you are watching grass grow and that can even be the case with a higher melee damage AT, so I wouldn't necessarily recommend it for solo play as a Tanker. Honestly, I like it on a Scrapper with ATOs and Alpha factored in for solo. I haven't done WP on a Tanker, but I did it on a Brute(Claws/wp no less), and it is very much if something can't kill you within 'x' seconds, then you aren't dying. The one issue I have with WP is that debuffs can wreck it. Still, I love Claws and enjoyed my ride to 50 with my Brute.