I'm taking a break before wrath comes out, I dont' expect to play my 70s (beyond dailies) before then. I'm thinning out most of my stockpile of mats before my accounts go dark, chanting mats in particular. Come wrath we'll get all-new disenchant results, and levelling skill 375-425 or so should be very easy.

Same goes for primals, gems and metals, I doubt the same ones will matter for levelling skills come wrath.

Herbs are the exception, keep some stacks around for alchy and inscription. BC saw quite a lot of overlap with old-world mats for alchy.