What is the best tradeskill for multiple toons in MoP?

[kate]

I'm having all my characters get max engineering because the new stuff coming out looks just damn fun, and having the ability for a paladin, shammies and a priest to go invisible is nice, too.

[Lyonheart]

I'm having all my characters get max engineering because the new stuff coming out looks just damn fun, and having the ability for a paladin, shammies and a priest to go invisible is nice, too.

Invis? WoW! Stuff like that normally cant be used in BGs or gets uber nerfed somehow. Is eng getting new mounts this time? i know the JC mounts look bad ass!

I was thinking of making my 5 Alchs> JCs as well...but might make them eng. and one of my other teams all JCs+eng