Nick...
Seeing as nobody else has answered your question, I will give it a shot...

I have a Pulse with an AXi 4120/14 and use a 4S1P Kokam 3200 pack
My set-up is capable of 700 Watts...
It will leap off the ground (no wind ) in about 30' or so, with a 13 X 8E (thinking about trying a 13 X 6.5E to get some more r.p.m. )

What sort of power is your set-up capable of?

This airplane will fly quite well on less power than I have...but I have a feeling that your set-up should be capable of close to the same power level as mine?

Welcome to RCU