Here is little details:
Warrior: Best for begginers and for me it's kinda best since nicest moves and got best swords
-chaos mode rly insane
Blacksmith: if you like muscles and having a 2h mace than this is class for you in chaos mode it's kinda insane just run to u and ur 1.2.3. dead
Archer: archer's aren't ezy mode expect if u like hit and run, i sow many archers going melee when warrior for example came but that was a mistake since melee can't hit strong. anyway u need to be quick with archer
.-chaos mode can hit 5 ppl at the same time hiting pretty hard
Mage: Quick Thinking. Fast. Combination. Right choice. this is for mages got many things to do, can aoe with bomb meaning attacking many playerrs at once.-chaos mode is kinda best looking imo.
Ninja: like
12125 said ninja dominate, but only experts, many new ppl just see NINJA owning so they say I WANNA OWN TO than they see there not skilled enough and get killed pretty easy and there all HAXXX! so yea...but in game got many skills even best when they jump into air and there gone and BOOM they hit ya
-chaos mode don't look any differend just bigger and quicker and ofc stronger.
so imo best to start with warrior if ur new.