First of, great work so far, with great potential.
I've played around with all three classes, and I think the biggest constructive feedback I can offer is... Katars (and their skills in the bandit tree) need to scale off of Dexterity/Ranged damage. Period. Both of the other classes scale all of their weapons and attacks off of a single stat, and it feels REALLY bad that Bandit has to split between two offensive stats.