Don't be such a spoilsport. Some people just want to sit back and focus on redbars/status ailments 100% of the time. Maybe throw a divine punishment, swing a sword for mixing it up a bit. For this player, would u recommend any investment in wis? I wouldn't. If someone wants to healbot, they might as well do it "well".
DISCLAIMER: I have never rolled a "healbot" and never plan too. But I do know ppl in game, who enjoy this role. Why build an evoker for someone who is not interested in... offensively casting?