You can bring a Reraise scroll, but won't necessarily help you due to reduced hp / mp pools, long casting timers etc.
Still trying to figure what the hell Khidir did to take a 900 Asuran, don't let him get close enough to do it but still, I took 2 for a total of 200 damage one fight (first one did 0)...
I was supposed to bring a -dmg% set, but forgot it on my win >.> You don't really need one though.
I think for me what I did was sleep him, then debuff. Rebuff, nuke once, sleep again, rebuff, chainpell > Aero III to 100 mp, sleep again, convert and heal up with Meds, then one more nuke to finish him off. I think it's about 6-7 Aero's depending on damage. I still have my macros for the fight laid out, somewhere...