This is my mapping for a midi fighter spectra designed specifically for transtions with bank 3 effects. This works very nicely with a 2nd midi fighter with deck grat/instant grat :) 

The top 4 buttons activate fx unit 3 for decks a,b,c,d

buttons 5,6,7 are the effect activate for button 1 ,2 ,3 of fx unit 3.

buttons 8 12 and 16 change effect values

9,10,11,13,14,15 are FX selectors.

Sorry for the crummy description.

This mapping works well overtop the remix deck mapping for the spectra aswell :)