I use the Mixtrack Pro 2 with Traktor and it works fine – all the mappings for Loop, FX etc work as intended. The only gripe I sometimes have is adjusting the pitch to a precise level (e.g. trying to get it at 120bpm instead of 120.01bpm) and the sensitivity of the jog wheels, but if I’m just recording a mix at home I can use Sync to get around that.
As far as I’m aware I have the standard .tsi from Numark.