Hey! :) Is a DS4 the PS wireless controller? If so then I would go with Square for A, Triangle for B, and Circle for C, but it will be a pretty uncomfortable time probably. I use my Genesis pad and I think it would be reasonable to use one for any port of the game. Turbo tapping isn't so important though if you have quick reactions, and especially in the arcade version where it's a bit more forgiving for the time interval you need between taps. All you're looking for is the speed to maintain at 324 and not go down to 300 something during your corners. The best advice by far is to play smoother and more defensively in terms of avoiding any knocks to other bikes, before worrying about maximising your corners - if you go wide in a few it won't make much difference.