Does this atomic can have bearings in it? If so, it will speed up a stage 2 armature because it will have less physical resistance.

Neo magnets will give you more torque, but they also drop the top speed compared to the regular magnets. If you need more torque for your truck, neos are a good way to go.

3x3 Stacked FETs with 6 cells/lipo and an atomic can motor with neos and around 35 turns would probably be a pretty quick set up. I think a triple stack of FETs would be enough for that motor.