Soloed this bad boy @72 today...
Cleared the 2 Weespes that spawn in this room, pulled him to the next square room, Gravity/ Bind as much as possible, Bio II and Poison II do all the work...Don't let him come near you, keep Blink + Stoneskin up AT ALL TIMES...Haste helps too with recast times...
Not too hard a fight this way, he don't gain TP to use pollen, at 72 I had ZERO aggro, and it was just a matter of letting him chase me around while Bio + Poison II DoT'ed him to a SLOW PAINFUL DEATH...
Converted once, fight lasted less than 30 minutes...