BladeMaster Assassin why? because it's going rare and also The Collector class is farmable but you will need patience becuase you need collecting tokens
Pros of BladeMaster Assassin becuase I have it already is it has massive AOE damage and also best for farming/pvp cause i already tried it.
I beat blaze binder 4 times using it and the farm is very fast just nuke your last skill and third one always. And last is, It is not mana eater at all. SO I RECOMMEND THIS CLASS!