Personally I would do ALCH / ENG on your second team as well. Just dump 1 ALCH for a JC.
I had multiple JC's on 1 team before and realized after dumping $$ to level it that it was a big waste.

Now I sit on 1 JC across all teams just for the cuts. On my home server I think I'm at 15 ALCH and they net me 2 - 4k per day with gems / cuts. Although I have not used them now in a long time.

Zenga pointed out the good pros of multiple JC's. I agree, not beneficial enough.

**EDIT**
I do not know what is in store for JC for CATA release. So you might want to look into that first before making a decision.