Hpi bullet mt is Around same weight as sct, only with bigger tires. No. 1 would be your best bet if you plan for high speed and heavy bashing but you need at least 3s-4s lipo to run it the way you want it. 😊👍

I would choose option 2 with mamba pro esc if most of your batteries are 3s. Using 2s on hpi bullet mt will just bloat your lipo battery with heavy bashing and speed will not be that fast.

Hope it helps. 👍