For Pve, Str-Dragon Sage is kinda nice. Since you have 75-100% Aoe Attacks, have decent tankiness and a Build in hp+mana absorb. would rate it either A or B Tier.

Since we have Zero Vit-Scaling on Skills opposite to IRohan i think Vit-Dk or Vit-Ds are kinda useless in pve, maybe good tanky option in Pvp where you can dishout okay dmg while still beeing full tank but mehhh wouldnt rate it to high.