Quote from Cide;47526:
#1. no, both enchants have to be of the same type to successfully bridge. get your hands on a thief enchant for an rA suffix. :D
#2. MM does damage over time so i'd imagine poison is the same, but i'm not actually sure on this. anyone else confirm?
#1
Don't waste the Thief D:
Use Healer instead!
#2
Poison does NOT work. While I haven't tested it myself, I assume they're like Arch Lich (all attacks negated to 1 except (special arrow/mob explosion), immune to poison, but not immune to mirrage)
However, Barrier Spikes and the actual draining part Life Drain
do work. That's how I clear my Longa runs since I haven't ranked range skills.