Your class levels
Enter each class's level and tick the one that's active. A class you're not using stays on once it reaches level 6 (Witch Doctor 8, Berserker 10). Saved in this browser.
How to read this. For each class you don't have on yet: what it gives at the level where it stays on after you switch away (6, Witch Doctor 8, Berserker 10) and at its max. A new class only levels from its own weapons, so pick the weapons you actually like using; the matching classes move to the top. The role labels are our own summary, not game data.
I mainly use
Auras are shared. In multiplayer, as long as you're near each other, every player's attacks can trigger every aura in the party, and two can trigger on the same hit (each rolls separately, at most 20% per hit, scaled by weapon speed). Each aura works at its owner's level. The sharing comes from players' experience in multiplayer; the per-hit rolls and caps are from Rebirth's code. Rebirth's "aura range" game option (party range by default) likely controls it.