Gates of Olympus Super Scatter bonus timing is random
Four or more Scatter symbols anywhere on the grid start the Free Spins, yet the reels give no warning of when that happens. One spin can bring the bonus at once, and a long run of base game spins can pass without it. The result of a session is random at every RTP, so no player can schedule the bonus round.
The reels run on one of three RTP versions, and the version in use is shown only in the game rules. Check those rules to see which figure applies. The gap between the three is small, so the RTP changes the long-run return only slightly, and it never changes the result of a single session.
On the reels, the top prize needs tumbles, multiplier orbs and bonus rounds to line up together. The ceiling is reached very rarely, and no session is planned around it. Treat the maximum win as the limit of what the game can pay, not as a figure to expect.