You effectively can’t, and that wasn’t the design goal really anyway.
I recognized a bunch of people at the top of the Advanced chart; I recognized 3ish at Intermediate, and 0 on Beginner.
Designed as accessible for different folks, compete regardless of how much you’ve completed (except for the brand spanking new folks). Unless you are spending for world energy, you rationally can’t really compete in multiple.
I finished somewhere around 14th in Advanced; I had about 60-80 world energy that I spent outside of the event over the course of the few days… and that was more than most because I wasn’t going for a top slot, and only went for top 20 as I somehow wound up there after clearing and then staying there for the next day.
That’s enough energy to clear through Intermediate (had the awkward split between 4/5* heroes and couldn’t make a team out of the 4’s alone) but it’s not enough for beginner. If I hadn’t been competing for a top 20 slot in Advanced, I probably would’ve had enough world energy to clear all 3, and that’s a good design criteria too.
Also had the rewards been superlative for beginner, you would’ve seen a lot of the big spenders chase that as well to the detriment of the rest of the player base. As it was, I had to go way down both lists to find common names on Advanced and Intermediate, there just weren’t that many of them and that’s a good thing.
I think the format was fine as it is; I think the loot awarded should be a bit more generous to all levels other than #1, but the relative weighting between Advanced / Intermediate / Beginner and the separation engendered by natural world energy regen were both pretty well designed.