100 amps is a continuous rating and so is 95 for the motor. Btw, the neither the 7xl or the 8xl will be drawing anwhere near that amount continuously. Typical continuous currents should around 20-40 amps. Even at 40 amps, that's about 6 minutes of runtime with 4200 mah cells. The main thing that will cause heat is the bec, so use u-bec instead.
Check out my custom converted 8ight:
Sub 7lb, lowest CG of any 1/8 buggy