My experience with trap crafting was decidedly disappointing. Even the top-level grenade lacks pop, and that's the one that requires soul gems to make (which I passed from Phuury). I made a stack of deadly (I think that's the name of the top level) cold grenades and tossed them at a bunch of fire elementals to see how they worked out. Should have been devastating, but it barely scratched them.

I've got 40-50 of each trap part on RhoGu, IIRC. If you want them, I'll drop them in the guild chest for you. Just let me know.