I would try this:
DTC ON, and either shifter in DS or in M2
Reason are.... DTC ON will allow a bit more spin without cutting throttle, DTC ON implies comfort suspension which might help the car traction better than when suspension is in sport mode like when in Sport+ or DSC OFF
Also DTC will have comfort throttle so it will be less touchy so might help you with wheel spin
M1 is a really low gear so launching in M2 might help you save a shift and avoid spinning too...
Try experimenting with that maybe some in DS and some in M2... and if you launch in M2 don't forget to shift
