Right now Channel Smite only works for melee strikes.
Could you possibly change it to a 2-3 action ability and allow the 3 action version to use a ranged strike? It's still the same action amount as doing a bow attack+ranged heal attack, but you get to tie them to the same hit and takes the saving throw out of the equation (still no more damage than the 2 action melee version though).
Just want to include Clerics of Erastil with the ability.