They have less endurance/hp and dex, so they can't be that powerful.
With all the buffs from Arcane Shield, Rock armour, Shimmering Shield they should be able to get an armour rating double of that of normal warriors, defense over 100, 100% mental/physical resistance & 75% to elemental resistances.
With Combat Casting, they should get a decent attack percentage.
To me, it sounds they'd be able to solo bosses. And with Wade's dragonbone armour, fatigue should not be that astronomically high... throw a few bad AoE spells in the beginning of a fight, then toggle all Terminator buffs and go whopping.
Combined with Blood Mage spells like Blood Wound, it should even be more ub3r.