Per profession:
* Enchanting: mostly high end mats such as Planar Essence, Arcane Dust, shards/voids, etc.
* Tailoring/First Aid: Netherweave and heaps of it. Expect to see people level to 400 skill with it.
* Smithing: Adamantite, Khorium, Felsteel would be the top 3 for levelling BS in xpack
* Leatherworking: (Heavy) Knothide Leather
* Herbs: Both high end herbs as well as a serious amount of low level herbs and anything in between really, as a LOT of people will be levelling Inscription from scratch on top of 375-450 Alchemy.
* Gold: to give to me ofcourse