The Dropkick (aka divekick) is an extremely useful tool for speedrunning. On top of being just a general fast mode of movement, if you divekick an enemy, Aletheia will bounce off of them and regain her divekick (ala SotN). We can use this against several different flying enemies to gain some extra height and skip up some places we normally wouldn't be able to access.

Fornax Escape Divekick Skips

Much of the zigzagging second half of the escape sequence in Fornax can be skipped by some select divekicks off of the local Driller Wasps and Spinning Turrets. (Note that the route shown here is a little suboptimal - it seems the better route would be to divekick up one level and then take the conveyer belt quickly to the right instead of heading straight up. A harder route, since the enemies after that are harder to set up for an easy divekick ascension, but it does seem faster if you do it right.)

Tartarus Bee Skips

Bees are harder to divekick off of than your standard enemy, since they're once of the few enemies in the game that damage Aletheia on contact. With a little understanding of divekick hitboxes and with some manipulation of bee movement, though, we can skip a couple of platforming segments in Tartarus.

Sylva Waterfall Skip

This is a big one. We can set up bee divekicks for multiple levels up the central Waterfall room in Syla, circumventing the need to venture into side rooms and all the usual backtracking that would be required to activate the fan system. A huge time save.