Holy shit. I had no idea you could stun those lvl 70 bosses. I know some of the roulette wheel bosses seem sketchy but they are all doable if you stock up on Hyper-potions. The hardest ones seem to be the guys who do the tankbuster/group stack combos. I gotta turn off my second monitor for those and focus up lol. I'm glad I'm not the only dummy who makes money this way :)
You need basic instinct and mighty guard for sure, astherical mimicry and most of the primal attack spells, then pom cure and a few others. There's full guides on it you can find.