I used the death method also. You'll be able to survive with either 2 sentinels like M_D said or a Sentinel and a Medic.
Use the belladona wand for added debuffs as well. Death success rate is 1% without it, 3% with it. You'll get it eventually. Once Neochu is dead, summon Hecaton to quickly end the little minichu things.
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”