The entering air of an AC condenser being 65 degrees instead of 90 degrees doesn't reduce the power consumption by that much. My compressor uses about 2200 watts with a 90 degree entering temperature and 1900 or so with a 65 degree entering temperature and the output capacity at the evaporator is more but the total likely doesn't end up being more than about 15%.
The best source of information for entering condenser temperature, power usage, and output with a TXV driven unit can be found from HVAC manufacturers information. Goodman has a solid product specification sheet for their units.
https://www.goodmanmfg.com/pdfviewer....pdf?view=true
One more important factor - An AC condenser requires unimpeded airflow, they can't handle much static pressure without losing flow, if you are adding a blower to push air through an earth tube, you MUST add that power back in, which could cause a net loss in efficiency.