Anyways, the OP isn't entirely accurate here. I play an artie. With maxed skill levels and poor gear, plus heroism pots, I have been able to disable every trap with a box (up to 7th lvl now on this life). I have one past life with artie and am using +5 disable tools - and that's it. No disable device item at all. Admittedly, and oddly, I found a +9 search ring for low levels, so that's likely helping find the traps. But once found, they're being disabled with no item bonus.