Honestly you are better off just selling your GPUs now. The merge is in like 2 weeks and mining profitability will be almost nothing. Every miner will give it a few weeks or so. Hoping that a coin like ETC goes up in value, however there is no gaurantee.

Just like a bitcoin halving event, your profits will be halved, nobody knows how much. However the profits are bad now, it'll be even worse. If the GPUs are worth a decent penny, just sell them to some gamer and buy coins like BTC and ETH and hodl.