My advice is to mine ETH and mine whatever else and sell it and hold Bitcoin. These 2 most likely you won’t lose money on.
Most of the alts are not going to make it. Even with free power you are wasting your time mining some coin which one day might go to 0.
Stay with ETH and BTC and you should be fine. Most people will tell you this.
Not like Flux and Ergo, coins like this will always make it, two bear market have happened right in front of my eye and many PoW coins died but if I should start naming the coins you would know that they are shitcoins, some PoW algorithm coins are as good as Monero, why is Monero still alive today? Why is haven protocol still alive today?. There are many altcoins that you can mine since 2018 and they are doing fine, Loki and ETN are another example.
ERG has never endured a bear market, has laughable liquidity and global trading volumes, and owes the entirety of its current success to bull market hype provided by Charles Hoskinson. It's also had FPGAs since basically day 1 so GPU miners are at a disadvantage here relative to projects like FIRO and RVN.
Loki and Electroneum are even worse off. Dead chains with no development. Loki's usecase is just dumb and not suited for blockchain. Why would I want my private messages stored on-chain forever?
Flux and Ravencoin will likely be fine but the former is more a tech company than a cryptocurrency project.