I just got my arse beat 3 times in a row by a guy in arena with level 80ish players. I have level 100-112. This dude has some special talent that I've never seen. The bar slid down like butter
A Succubus alone with high level skill can do major damage in arena. Combine her with maybe a high skill Ninja, plus a Druid and maybe a PD (both of which have skills that increase your allies' ATK), and you have a pretty strong team that can easily beat heroes of much higher level, especially considering that skills stack. For example, a Druid with skill lvl 4 increases everyone's attack by 25%, and a PD does the same. When they both proc everyone has 50% boost to attack (not to mention increased attack rate thanks to PD), so then when your Ninja procs his lvl 4 skill (500% strike), he's going to do 750% damage. Toss in a Cupid that stacks another 25% DMG in addition to increasing everyone's proc rate, and you might be unbeatable. That's not even considering high level talents thrown in.