I like your choices - not a bad 3 ball group.
Just one thought for you though. A couple of things you said lead me to big backend balls. First, you say you are an `15 mph tweener - which in general is slower ball speed. Also, you say you like to play an inside line. Both of these things lead me to equipment that will store energy in order to have a stronger angle of entry.
For me a combo of a Special, Sure Fire, and Jolt would be better for slightly higher speed strokers playing up the track. If you want backend reaction balls for a tweener in that range I'd go with an Attitude Shift, Shift, and a Jolt Pearl.