This Warden build is designed to farm group dungeons fast and efficiently, putting out a decent amount of direct damage while applying DOTs and locking down enemies with the chilled status effect. Shimmering shield charges your ultimate while you regen magicka from absorbing ranged attacks. Switch out degeneration for growing swarm depending on your preference.

Gear and enchant tips:

Weapons:
Nirnhoned/infused on your primary weapon with weapon and spell damage enchant.
For a frost staff I go with infused. Swap for resto staff with powered trait if you need more sustain.

Armour:
Go for heavy armour in the large slots and light in the smaller slots. Ideally you want divines on the smaller for the mundus boost and infused on the larger pieces for more magicka. Equip a monster set like Grothdarr or Illambris and front bar the Mother's sorrow set with either Necropotence or New Moon Acolyte (craftable 9 traits) for even more crit damage potential. For tougher challenges consider Troll King's or Mighty Chudan for more sustain or damage reduction.