Building A Fast Samba Rhythm?

[MeditativeDrumming]

Anyone have any tips for building a fast samba? I need to get it up to about 150 bpm (half note). I'm talking about ride cymbal on 1 & ah 2 & ah /bass drum on ah 1 ah 2/ hh on &'s.. and left hand comping.... you know. Do you think it's best to play it slower at 100 bpm for maybe an hour every day, or to try to strech myself immediately? Also, I do use the heel toe for the bass drum which is supposedly the best for this constant samba. The thing is the faster I go above 100, I seem to lose control and comping becomes difficult... Any ideas much appreciated.