personally i use archon. rachel hits 9 times but its too slow(for me). archon hits 5 times, but people think its slow. explanation below to jayz89 why i use archon
this is where you are wrong. its true that if your dps is slow, 1k per hit dpser is better, like rachel. but you use 3 block = 9k dmg, my archon use 3 block 30k dmg. why?
because when i use 3 block the boss get stunned. when he's stunned all damage are dealt normally. adding on bella, he dies even faster. my archon do the boss in 30 seconds, 1min tops if my block sucks. honestly.. i keep telling everyone this but no one believes. i gonna do a youtube vid soon.
edit: vid posted below.
my rachel is 4 star when i did the boss. dont listen to people saying get 2 healers, get a tank that hit once, a healer that can focus heal (like mew) and get mana recycle for rachel and put leader on her.
edit: i will put reasoning for this here. when you have 2 healers and a dps, you will get pushed back hard against the wall. when that happens, boss will slam ALL 3 of you, and should your healer be unable to cope, you die. having a tank at the front helps to push the boss back, let your healer focus heal. the only con is that you heal the boss everytime you use a wrong block. (500hp per wrong block, and boss gets a temporary attack buff that last 10s, and the buff stacks for every wrong hit you do on him). just make sure you dont spam wrong block and you'll be fine.