Healing and defensive abilities aren't reliant on INT at all. The ice spells are though.
I'd suggest Conjurer + Necro over Summoning + Hydro and a little in the other trees to support your summoning. You can still get the healing abilities from Hydro to support your summons if you want.
Necro has a lot of abilities that mesh well with Summoning.
Hydro goes better combo'd with Aero, so you can freeze or stun to your hearts content.
Last edited by Nokturnel; 21/09/17 11:17 PM.