The skull brute activates at the line shown in the videos. There is a period of time where the damage hitbox isn't active while the animation plays, so we want to get on the right side of the skull brute before it's active. Time your pogo to be at that line to make it more consistently :3
Improvement to the early game ant arena on the way to swift step that saves up to 3.1s over the one in WR (avg was about 2.6s better). First video is just the arena, 2nd video is a voiceover explaining everything.