The mid range cards are probably doing better when including cost of the card and cost of elec. The reasonably best ETH MH I saw for Vega was 47 but I imagine others have got higher?
Vega doesnt have to run hot if it undervolts well, that varys but alot can go much lower then anything stock indicates initially. XMR appears the most profitable but ETH is very bullish crypto for a while now.
Do you have any frontier vega's and if so what are your settings?
This Geek Mark already did all the work for you.