I found having a single aero/hydro with 3 phys goes quite a long way. Allows for easy CC on mobs without magic armor while your phys dps burst down mages and some added support via healing/magic armor restoration/CC removal.
Necromancy/using a shield on a mage is still suboptimal, since you're gonna lack the warfare points. So that's straight up 50%+ multiplicative damage out of the window.
On a sidenote; How do you enable scaling above +1 with the enemy scaling mod?