Rune of Exuberance or Wurm?
I’m gonna guess Wurm, but don’t take my word for it.
Exuberance: You don’t need the healing power or precision from exuberance. The power you get from it will be roughly 150 power with full valks.
Wurm: Crit dmg will increase by roughly 16.6%. Given that you are in shroud with party buffs, you will have close to 100% crit chance, so that’ll turn into 16.6% damage increase?