My foudation color is NW50 in M.A.C. What color concealer should I buy from MAC and which one is best for Oil?

I have acne prone/ oily skin.My foudation color is NW50 in M.A.C. What color concealer should I buy from MAC and which one is best for Oil?
In my personal experience I am typically one-two shades lighter than my foundation color. Also I go with the NW colors for under eye circles and NC to cover up redness/blemishes. For oily skin I'd recommend the either the Studio Finish, Studio Stick, or Studio Sculpt concealers.