gas limit default value / priority/max fees during gas war minting?

Hey all.

Does gas limit on metamask go to a default value after every transaction? I just checked and the current value when trying to swap on uniswap its "179592". I heard that standard is 21000. I don't know if I accidentally changed this when I played around with it a few months ago. Any ideas? I am aware now that you shouldn't touch the gas limit.

Also I'd like your input on a matter to help me better understand setting priority fee and max fees during an NFT minting event. I am willing to go as far as paying 0.1 eth for the transaction to go through during that event when there will likely be a gas war. What's the best course of action for setting the priority fee/max fee values? Should they be the same ( 0.1E/0.1E ) or something like 0.05E/0.1E ?

Any input appreciated.