Just tried measuring resistance... i don't know if it's my meter but i found it difficult to get a reading. Looked like all 3 combinations of 2 wires had around 0.1 ohms resistance (i say "looked like" as the measurement would drop off to zero after a couple of seconds)
I took a quick look online and that figure seems to be about right
(link)
Sounds like i just need a beefier ESC to make this thing work. I might get the Mamba repaired and sell it I think.