Are they any good? PvM and PvP wise...also bramble vs enigma?..

Enigma, Bramble mabye for PvM.

The ability to teleport is invaulable to a nec, they have like no life..

They do O.K. PvP, remember you'll need to hit them once more once you nova them down to 1 health (another nova or fire golem's aura)

A fun build, but they can't compete with the stronger PvP'ers

poisen SUCKS bone is way better man