Duo'd this with Souvrin(NIN/DRK) and myself (RDM/BLM) after awhile, my Gravity spells became useless as they wouldn't stick. And with ES Gravity, it lasted only a few seconds on Iriz Ima. She is easily kited around the tower, I forget the position, but is very slow and doesn't spawn Chigoe's when she uses her TP. Took about an hour to do it, no drop unfortunately. I believe RDM can solo it, with tons of time and maybe items, but I am not too sure.
Edit: I'm so sorry, I forgot to mention that Shortfuze(RDM/BLM) helped out too. >.< I'm sorry SF.
Edited, Mar 9th 2009 3:15pm by SilveriaChan