I'm inclined to say that you can get through the wall in 8 minutes rather than 15, using a power fist, though I doubt there will be any organizational problems with it.<br/><br/>2d10+24 pen 9 IS pretty awesome damage, though good quality daemons will still survive that.  Some of the bigger orks can take it as well, and good luck making it stick on an Eldar.  (if an Eldar gets hit with a power fist, it kinda deserves to die; especially a wych)