The absolute best would of course involve the Increase Reflexes spell, cast with edge and then held with a sustaining focus. If you optimize for this specifically, you're a pixie with 7 edge, 20 dice for the spellcasting roll at char gen (6 ranks, 6 magic, 2 spec, 2 mentor, 4 spellcasting focus)
A metatype (pixie), B magic (aspected magician), C attributes, D resources, E skills. Mentor Spirit. 20 karma on a F4 spellcasting focus, F3 sustaining focus, F2 sustaining focus, F1 sustaining focus. Increase Reaction gets you to 12, Increase Intuition gets that to 11, Increase Reflexes gets ~11 hits for +11 and capped dice. Congratulations on 34+5d6 initiative, average 6 passes and probably being useless during all of them. You could swap around attributes and skills allocation, since you need reaction and intuition to have no points invested, and you're left with few places to put points.