[starscream]

You will indeed lower current by both increasing voltage AND lowering the gearing. You will also increase the potential amp draw by increasing the voltage. This is why you may see high amp spikes

What you should be looking at is the average amps not the amp spikes. You may see a 91amp spike but your average amp draw should have decreased in comparison to the 3S setup with appropriate gearing.

For instance, I have recorded an average of 40amps with 8S A123 and an average of 35amps running 10S A123's with appropriate* gearing

It looks like you had an average amp draw of 8.38 amps. I would guestimate that 3S would increase the avg amps to ~ 12+ amps

I would be interested to see what you record with a 3S setup with appropriate gearing.

* appropriate gearing is the gear ratio required to meet the same speed at any given voltage