In a VGC sense as a supportive Pokemon which would be better?
It's moves would be Follow Me, Thunder Wave, Protect and Magical Leaf/Air Slash?
Btw it will be supporting a Dragon Dance Tyranitar.
Yes Eviolite Togetic is a very viable option. I would suggest the following moveset:
Ability: Serene Grace (for those secondary effects)
Nature: Bold (+Def, -Atk)
EVs: 252 Def/252 Sp.Def/4 Sp.Atk