Slippage
Trojan's FAQ suggests starting low, around 10% to 15%, and raising it if you see failures due to slippage. Volatile tokens need more, and copy trading needs more still. With MEV protection off, people generally use lower slippage. Snipe slippage is a separate setting that typically needs a higher percentage because of rapid price moves. See what slippage is.
Priority fee and bribe
The priority fee is paid to validators to speed up execution, with diminishing returns at higher amounts. The bribe is the amount used for MEV protection when it is on. Trojan's docs give no numeric target for either and suggest testing with small amounts.
MEV protection
Trojan says protection hides your transaction, bundles it privately and routes it to trusted validators. Turning it off may increase speed but reduces protection. Trojan also offers a way to split a larger buy into smaller transactions to reduce MEV risk.
Sell side
Copy Sell and Auto Sell each have their own priority fee, bribe, slippage and MEV settings, so buy-side values do not carry over. Set all of them.
See Trojan, Trojan copy trade checklist and the Telegram bots page.