After the latest patch the curious fire sentinel build opened up.
Basically what I am doing is vengenace(all fire stuff + triple retaliation) + rebuke(only the chance to ignite + all the defensive bonuses) + lunge (all buffs) + holy aura(the fire bomb or whatever its called + the defensive buffs) + that flame AoE attack from the Forge Guard(no tree yet, unfortunately).
So far died only once during the campaign, can tank up pretty well but the damage seems lacking. The ignites are kinda weak. Having only 4 suffixes per piece of gear is unfortunate because its hard to scale them without the damage overtime suffixes.