Here's the thing: The thing is pretty crap on most champs, save like...
specifically.
Problem 1: It's too weak to buy for mid lane now. Some stupid ORIANNA buying it, or some Lux, or whatever, using it for the healing thing is a waste. You're there for damage dealing, not shields and heals. It's a waste of dough because you aren't buying for what you're meant to do.
Problem 2: You need to do damage to make it work. Issue here is that all the damn damage items of merit are mid laner oriented picks that cost like 3.2k or whatever. Supports have nothing outside of Athene's, FQC, Ardent, Banner, and EotW tailored to them, so getting the damage to stack the item well enough for the heal to do much is rather difficult. Sure, it's pre-mitigated damage, but you're still getting like...80 a Karma Q or so. Sona bypasses this issue because, when she uses her Q, she has multiple sources of damage coming out in one shot, so the Q, the AA, the FQC line damage passive, and the powerchord all stack the grail, so with an Ardent + Grail + EotW, you can get a decent bit of healing off the next W. For literally anyone else this item is either shit or lackluster depending.
TO BAD NO ONE CARES THOUGH!
[slayer-jinx-catface] [slayer-jinx-wink]