I did this as a BLU/RDM, a combination I have come too like; even if I can't beat as though mobs as with blu/nin it gives more flexibility and for doing quests and stuff it is great having sneak/invisibility and still be able to fight back a bit.
I was a little too careful my first try and let my NPC work very hard but my cures wasn't really enough and NPC got beaten. Wasted a few Yagudo drinks too. Then I thought I would wait till lightsday (that I read somewhere is a good day for this) but didn't have the patience to wait 3 hours so I gave it another try. This time once my NPC (stalwarth shield) had done a cure IV I started spamming spells like on any other mob. Just had to get behind her the 3 times Vassago did his move. In the end my NPC and the demon both had just a sliver of HP left and I wasn't sure who dropped first until I saw the little film clip in the end and I noticed that the log text said I defeated him. A fun and exciting fight.
Edited, Jun 5th 2007 12:36pm by Aljesaf