Reboot world discussion and tips

Hello, for any KMSer's that have played reboot

1) What classes are the most efficient for bossing (both solo and group) given the restrictions on obtaining gear in the server.

2) Are there any bosses that have yet to be downed? (e.g Chaos pink bean, Root abyss bosses)

3) What classes are the most popular in the server so far?

4) What endgame gear are the strongest players using?