Bonus round timing and session results
Budget for a long run without the bonus round, because Gates of Hades does not follow a schedule. Nobody can know in advance how often the bonus round will come. The result of one session is random whatever the RTP version, so a session can end far below the stake or far above it. Set your budget before you start.
Open the game rules before you start, because only there is it shown which RTP version is running. Read the version number before you commit a budget, so the figures in the table match the game you are playing.
Plan around the bet you can afford to lose, not around the ceiling. The maximum win is a multiple of your bet, so a larger stake raises the amount at the top, and the ceiling is reached very rarely. How often that happens cannot be known in advance.