There is no reason for a SCH to get spell speed as we have no HoT outside of Eos' Whispering Dawn. The return for cast time reduction and GCD reduction on spell speed is terrible. BiS SCH stats are still Weapon dmg > Mind > Crit > Det > SS = Piety. If you can't get Crit, go for Det. If that isn't available either, get SS or Piety.

This is probably your BiS list here.
http://ffxiv.ariyala.com/R2RP

For food, I would say the best is Baked Pipira Pira, gives crit and a bit of ACC so that you will miss less, as SCH should have plenty of time to dps. Otherwise you have Frozen Spirits(Det & Piety) and Hot Chocolate(SS & Piety).