A dude for whom 2K is a lot isn't going to be prioritizing a near to 100K helm any time soon.
Locustlure is an interesting suggestion, and probably a good one. A 1/3-ish slow, even as a random special effect, will reduce the healer's mana outlay more than any other item for several times the price would. Eventually you'd want to look at some other utility procs as well, like tash stick (cheap, and even the cleric could use it) or stave of shielding (not so cheap).
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