The question I have to ask is why are you mining lyra2v2 coins when you can be mining crptonight v7? Your losing a fortune given that monero is highly profitable. If you want vertcoin or monacoin etc. you simply buy them after selling monero. Vega cards are cryptonight monsters.
Mining is a hobby not an investment. So I knowingly leave some $$$ on the table, I don't want to increase the number of trades I have to report by auto-swapping, so I mine the coin I want to hodl. On top of that my returns have been higher than most online calculators have predict, so on average my mining returns are fairly close to any other algorithm.
Periods like the past week or so with XMR and vega are a bit of an exception, but I have other reasons that I want to push and tune my vegas for lyra2re2 as well.
Speaking of which, I have all 6 of my vega 64s running at 60MH/s (barely) while at -25% power limit. (1460watts at the wall for the whole rig)
I think I've hit the limit without further increasing voltage/power draw, as stability (and hashrate) goes down if all cards aren't running at the same speed, and it went unstable when I tried ~5mhz higher. So I think I'm pretty much done. I might try to see how far I can lower memory voltage....I probably have a bit more room there. Helps with heat control.
Something else that gave me a little bit more OC headroom, is to find out the average voltage that your core oscillates around at your desired power limit, and edit your power play tables to have more options around that average.
In my particular case, my cards average at ~900mV at their power limit, so I have p-states at 800,850,875,900,925,950,1025,1100. So a higher number of voltage options with smaller voltage jumps right around that average for the card to jump around to. That is useful if like me you can't get your cards stable at a constant voltage.
This is a measure of scale. The bigger your investment the less it's a hobby. I would normally agree with you about not caring about what you mine when the differences are small in profits. I draw the line where I can earn 50% more by mining something else. Even if you just wanted to you could use nice hash to mine the v7 algo and receive higher payment in bitcoin short term. The only reason I would want to mine directly is if I think that coin is going to at least double in the next three months. Other wise your just better off paying taxes.