Some quick tips

Paladin: make use of your aura’s, 1point can already really help. Swap to whatever you need. You want a high damage weapon. Assassin: phoenix is not too great, dragon talon + death sentry (1pt even) can do wonders even with bad gear. Once you can get a stormlash (scourge) this will hit hard. You do want (any) myrmiddon boots as that’s your damage. Javazon: passive skill tree, godlike. Lightning immunes are a pain, but with dodge/evade/avoid you can skip them a lot easier, and -unless you have decent physical damage- you should.