Build for +Res -Atk Innes?

Mage tank, similar to Felicia, basically.

A slot can be Fury, or something like Warding Stance for more tanking and Iceberg damage.

C skill could Atk ploy for making it easier for your team to tank hits, or Def Ploy to kill things faster, or even Spd Ploy to make things slower.

S slot could be Distant Defense for even more Iceberg damage.