Theory crafting, ariyalas calculator BiS with and without food. Without food shows no skill speed, but add black truffle risotto and you get 52 Determination over the BiS option with food, but that option loses that DET in favor of 57 CRIT + Skill Speed.

Option #1: With Food Calculated
http://ffxiv.ariyala.com/OYPZ

Option #2: Without Food Calculated, then adding BTR for DET
http://ffxiv.ariyala.com/OYQ3