I've never bothered to get anything past 18 yet myself.
To be honest, I have mixed feelings about the automated event schedule. While it sure allows for an easier planning of the activities for the upcoming week, it also takes away that element of surprise that came with each update. Also, there are waaaay too many heart-based, one-week stages with that awful 25/12.5/6.25 drop rate: this makes the farming of 120SP abilities a real nightmare.How is everyone going about the end-game? Personally I have a decent stash of items, so I'm probably going to focus more on skill grinding and finishing the main stages rather than EBs. Will still run each competition once just for the sake of it, too.
POgre also can't be farmed and requires 200 SPs. Kyogre is still a good investment for burst damage and I'd recommend farming it if possible.Kyogre is outclassed by the primal form, even if you are far (like me), once you get to the primal you will feel as you wasted the time of farming