Considering that this mob is available after the Betrayer mob, this mob, the blob, and the triplets should drop the Phantastic weapon patterns as well. It's very disappointing to spend all night killing this mob for no patterns. Also, that power drain on this mob can suck it. Just saying.
Yeah the mana drain is just too much... this fight is **** because of this... not funny at all to do... need to divide by 2 the mana drain and then it should be ok. Going to full and instantly Zero is not right...
do it once for access to vex 2 and shoulder update and be done with it.. that's what most people have done