With tauti update, healer class got some active skills option to Over enchantment, some of them are worth OE, like progressive heal, salvation brilliant purge, balance life, but I don't see the utility of certain OE options like Chance for rebirth or cost on buffs we merely use (Olympiads maybe but the cost of over enchanting does not give equivalent benefit on these skills.
I'd still say no considering the cost of enchanting the thing. Even at +5 on a tank with 50k hp you're looking at only 2.5k hp heal, which won't exactly save anyone or make much of a difference.