I can solo this on SAM/DNC by kiting it using Desperate Flourish. No drops yet. Even when my TH3 THF friend came and helped. Usually kill placeholders for an hour or so until it pops.
EDIT: The proc rate on the drain is typical for these kinds of weapons, e.g., 5% or less on VT-IT, not much more on EM or less.
Killed place holders for 3hrs with my Nin/Dnc last night, went back today War/Nin and killed place holders for an hour and finally popped.
A quick note, when fighting the normal mobs: Rafflesia- when they do the move " Floral Bouquet"(AOE sleep) Will cause bee's next to mob to become charmed. Bee's are pretty weak so nothing to be carefull of. Just thought it was kinda cool move.
When NM spawned there was only one bee near by and I did not see it charm it etc, however as soon as it went past it, the bee followed it and when I pulled they both came. So it looks like if NM has been up for awhile, more bee's (possible of 4?) will link with this mob.
I fought NM today as War/Nin, with my wife Dnc/Nin fight was not to bad untill it did sleep move, but was able to finish off last 30% by myself. Bloody Bolts help, would of been much easier as Nin, but was tired of playing same job camping same stuff.
This weapon is dropped from a new NM in Fort Karugo-Narugo (S) called Kirtimukha. It's a Rafflesia, and spawns on the outdoor portion of this zone, around I-10.