I really didnt find the existing set up for the slopeball easy at all, and from my understanding, neither do many ppl, esp for shamans. Thats the reason why i've been looking for a more consistent (and hopefully faster) way of setting it up.
To begin with, you are going to line yourself up with the edge of the platform (or run up to it), then you are going to dash making sure you still have your aerial dash, then you dash again once you reach that line (1st image). Afterwards, you need to pogo as high as possible (you can use the horizontal line (2nd picture) as a reference, but you have 4f to pogo). To finish it up, you need to dash as high as you can (this roughly lines up with the beginning of the root, but i found it more comfortable to just dash at the peak of the pogo) and then shortly after the dash ends you need to fb.
The most common mistakes i've found are not dashing close enough to the edge of the platform, pogoing too late / too early, delaying too much the dash (its not super precise, but it can happen), fbing too late (this also isnt too precise) and doing the final dash up to the platform too low (the wiggle room for this will obs depend on how well you did the rest). Most of this will either cause you to not reach the platform or to simply not get the slopeball, depending on how well you perform the rest.
Its also worth mentioning that you can try to back it up by replicating the skip starting from the pogo.
Fastest and most consistent arena I can think of. Lowering the platform makes the first petra double consistently. Wave 2 is a little tricky to always get hitless, so it's not too much slower to just play it a bit safer. kinda rough example in 2nd clip Nothing is as fast as getting an rng double on whatever petra is further from you, but it's super unworth to go for imo
For gpz% (first 2 clips) and forgotten corners (second 2) saves several seconds if you have wings, cdash makes it easier (fireball skip version is kind of tight imo). camera is a bit weird but fixes itself after a couple seconds as you see. jumping straight up to the platform (3rd clip) is possible but it's easier to just dash left if you aren't confident and that still saves time
(dropping off the platform at start like i did isnt part of the strat, its just to fix my savestate so that the camera moves)
Consistent set up for wings grub that requires a hazard dmg tank. It is really consistent and easy, you have to jump and slash without touching the slope, jump again and fb at the peak of your jump (later than you think)(3rd clip [full movement to the grub]).
If you touch the slope on the way up the first time, you will be more to the right and the fb will slope but you wont have time to pogo it (1st clip). If you fb to early (or too late technically, but thats more rare) after the second jump, the fb wont slope (2nd clip). If you mess up one of the object pogos you can back them up (4th clip). If you miss the skip, you have to dmg tank again. (Be careful with not falling too much or your hazard respawn position will change and you will need to climb back up, which is quite tricky and slow)(You can use the crawler to the left to get some soul if you miss a few times).
This is optimal regardless of if you get wings afterwards or if you do wingless route.
You can use 2 flying enemies at the end to make it easier or if you dont have an extra cast/ health.
For the first mawlurk the key is putting yourself against the wall and dashing, then just go as fast as possible and make sure to jump over the mawlurk, one of the infection projectiles might go towards you, after passing it, you can tank the dmg and continue or you can delay the dash or stop entirely until youre safe, its good to mention as well that a lot of the times it lands right next to you and doesnt actually hit you, the projectile hitting doesnt happen too often. On the way down you can do a little ceiling boost, but make sure to not land on the most right zone. For the second mawlurk i recommend jumping where the shell next to the wall ends and dash slightly above the groung to avoid corner correction. From there, keep dashing and pray to not get hit. As for the 3rd mawlurk, you should dash just as you pass the little mark on the ground next to the grass, and you can stop holding left for a moment if you want to be safe, again, there is a chance that a prejectile hits you after clearing the zone where the mawlurk shoots, but its very difficult to rect to and its rare enough. For th 4th one I try to dash as i land on the slightly below level, but I havent found a good enough set up, the most important thing is to not fall into the spikes. After clearing it, you are going to want to stand to the right of the hole, dash left, jump, land on the higher ledge, dash pogo and dash quickly, and either wj and wj 3 more times on the left wall or land, jump and wj 3 times, hold right after that last wj for a bit and pogo the enemy thats directly above you. Continue to the last mawlurk, dash on the middle of the high part, dash again as soon as possible, jump, dash again as soon as possible, as you land jump, stop holding any directions, pogo and dash over it.
small change in strat over the snek yumps when leaving the mawlurk room that i mostly see. much more lenient jump timings and lets you buffer compared to walljumps which have no buffer.
slightly faster on avg for me (~0.02s), and almost 0.2s faster when comparing my best attempts of each.
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