no one has mentioned this but...
Tyre pressure has a lot to play, I was skidding 225/45/17 RE01's at my last drift day in a 250hp @fly s14a no bother with 60psi, then moved to Dunlop Sport things 253/40/18 @ 50psi which had less grip even though the size was different.
If your not slidding enough, put the PSI up a bit, if you have no grip or running 205/xx/xx or something drop it. I try to get each tyre to grip like the last by doing this.
Id say stick to what you know, alter PSI until your happy and go do boss skids
