Less esoterically, I'd assess my relative competitiveness in the market (energy price), compare that to the industry mean, and weight my assessment accordingly.

If your power cost is above average, efficiency is most important.

If your power cost is below average, capital cost becomes more important.

I'd say the industry average is about $60 MWh rn.

TLDR; if your energy cost is above $60 MWh don't buy anything but the most efficient miner available.