didn we have a topic about this already somewhere somewhen? tho pyro still scales well with icewall + psy combo - sure it falls behind after a while and becomes less significant (specially after you go rune) but its still additional dmg the dmg isn being recycled into zero or anything
plus (taking from a couple videos on youtube) feather can suck his own balls to heal (ya it sounds nasty but its the dirty truth x.x)