Before the first spin of Zeus vs Typhon
Choosing a stake for Zeus vs Typhon means accepting that the bonus round may not come at all. How often it comes is not known in advance. The result of one session is random, whatever the RTP version running. RTP describes an average over a very long series of spins, so it says nothing certain about the spin you are about to make.
Checking which RTP version is running starts in the game rules, the only place it is shown. Five RTP versions are listed for this slot, and only the rules name the one in use. Read that line before the first stake, since the version sets the return the game is built on.
Planning around the top prize means keeping the ceiling in view. The maximum win of Zeus vs Typhon is x10,000 the stake, and it is a ceiling reached very rarely. Reaching it is not a result any session can be built around. Treat the figure as the edge of the range, not as a goal.