I built one based on the suggestions given in my thread, found here:
It's not the strongest pairing, I feel; having to add in a couple of epic or ancillary power pools (Stone Mastery, here) to really complete a build rather than add a few frills sort of feels like cheating to me, plus it meas something of a slog leveling. That said, I have had fun with my toon (she's something of a "main" for me right now) and I hope you do too!
I mainly use my toon for Rikti MSR now and based on that and previous experience, the Poison Trap does hold a bunch of procs, but you can never bet on all of them firing, so they often don't add up to a lot. Again, this build didn't feel so strong without a couple of "real" attacks thrown in from Stone Mastery, and even then it doesn't like PWN the whole map in seconds or whatever. Decent enough team player, helpful with AVs or something I guess, there are debuffs, but not like a strong duoing or soloing build. I almost never fire off Mass Hyp with that heal proc in it, there's usually other, better things to do. Following this build above, there's not much else slotted in it, so it often doesn't do a heck of a lot for me. It's best applied in groups as big as you can swing and want another button to mash, but isn't something to like live and die by or to depend upon to save your life.
If you have any other questions, please post and I'll do my best to answer them.