Brushless drive ESC

[Shakey]

yes as long as the motor is a sensored motor. However I'm not familiar with the ins and outs of using a brushless for drive. As far as I know it's only been done successfully either on the continent or in the states

You're wrong, back EMF can and is read from a sensorless motor. Back EMF is read from the inputs to the motor. I am actually leaning more towards sensorless setups in fighting robots. Sensored introduces more parts/components so more potential things break and often they are simple optical sensors and under certain conditions can fail (generally not built for robots tumbling all over the place). Part of my lean towards sensorless brushless is the entire motor becomes a single moving part with just windings and magnets. Not much to get knocked about and fail.

EDIT: The 700 Amps is probably the combined peak rating of the FETS. Wouldn't fully trust that.