Now lets not go off topic, I was talking to a crafter in game and he suggested I get the following skills for cross classing.

In order of importance-

Tricks of Trade - ALC 15
Hasty Touch - CUL 15
Rumination- CRP 15
Steady Hands II - CUL 37
Byregot's Blessing- CRP 50
Innovation- GSM 50
Careful Synthesis II- WVR 50
Ingenuity II- BSM 50