I am going to start running this (or at least keep skip finding).
You don't need to make the grappling hook in the 2nd level. You can climb the cliff and will be automatically be given it at the start of 3rd level.
The Sticky Bomb is BROKEN. You can plant one under a crate, jump on the grate and get launched. I have skipped at least one section using this but this will let you skip many many more. I will be doing some experiments with this.
Lastly when approaching someone from behind, if you don't stealth and instead jump, you can jump on their back and don't lose time moving in stealth.
I did a few videos last night. These are pretty slow in video but should be quick with a bit of practice.
How does Lily get past this? Does she warp or do you just not need her? Side note is there any RNG to the blasts or will it always go the same place if you place it correctly?
You can trigger a checkpoint when you go OoB, and then you can load the checkpoint you just triggered, and Lily will warp with you.