Thank you. In this case I'd recommend Spell Focus Conjuration (for the battlefield control spells) or Evocation (for fireball), and Spont Metafocus Fireball. Optionally, dip into crossblooded sorcerer to boost your damage.
Good catch. And yes, a SAD character is very good to have, especially if you take feats like Scion of War (cha to initiative).
CE by itself is pretty worthless. MS is therefore spending two feats for a +2/+2 (as long as you have certain buffs active to grant you concealment). That's basically the equivalent of taking Weapon Focus and Weapon Spec (which are always on). Frankly the Magus already has very high spike damage and good buff spells, so these feats aren't needed. I'd rank them all orange (ok but not spectactular, and you can do much better).