Consumables and Others

[Ammonite]

Looks like there's two vendors at the Valentine's event that sell buff food. The mastery food is outclassed, but the versatility food might be niche as the best 60-minute vers buff.

https://www.wowhead.com/item=210841/buttered-oysters gives a +2 Mastery
https://www.wowhead.com/item=210842/fresh-fig gives a +2 Versatility

Horde - https://www.wowhead.com/npc=214493/ming-plumpaw
Alliance - https://www.wowhead.com/npc=213096/guo-plumpaw

 

[sector3600]

As you need engineering for some of the ones you have listed, there is one I'm farming for as it's a consumable that can help detect stealth players in PvP/stealth mobs PVE ~ Gnomish Alarm-o-Bot (probably noted in that comprehensive PVP items link mentioned earlier).

As another note, some items on the list are deactivated in battlegrounds that raise your level >= 30

Also, cannot craft in most battlegrounds so if these are to be used in battlegrounds, the food or items have to be already created.