Help outdated relic with a decision?

In the past when I played MapleStory I always played it as a solo game just doing my own thing collecting odd items doing quests and etc, but now I find myself wanting to return to MapleStory and do something I never did before and that is boss (Before the only boss I really did was Zakum) so I am wondering what is the best character for bossing? I mean I've seen the DPS charts and all that but does that translate into the best solo bosser? Preferably I would want a class that is good at solo bossing up to the most recent KMS patch if anyone has inside info on that.

Besides the character I am wondering if I should do a normal world or the reboot world. I personally don't mind paying to win but what I want to know is are the bosses on the reboot world still as powerful as their normal world counterparts?