Plan for swings you cannot predict
Deciding when to keep playing gets harder when no one can say when the feature round lands. How often the bonus round comes is not known in advance, and it will not follow a pattern you can read from earlier spins. The result of one session is random, and that holds whatever the RTP is, so a long dry spell and a quick hit are both normal outcomes.
Deciding which RTP to rely on starts in the game rules, because the RTP version running in this game is shown only there. Open that section before your first spin, and check that the version named there matches the one in the table above.
Weighing the top prize against your stake starts with one fact: the maximum win is a ceiling that Gemhalla reaches very rarely. Treat it as the upper edge of what the paytable allows, not as a figure to expect. Every session has its own result, and no session can be planned around that ceiling.