I still use the same route as I don't think there's any other honestly (but I might be wrong), which is a shame. The biggest issue with this route is that there's a bottleneck with how fast you can be, since you need to always wait for the 2 Gecko's to jump to the middle. It is possible to be fast enough and kill the 1st Gecko before he jumps to the middle, but the 2nd Gecko will always spot you, meaning it's pointless.

The rest isn't more fun as you're at the mercy of the stupid guard detection their awful backstab trigger and RNG. Sometimes when you get the 1st guard to turn towards the wall, he will 180 no-scope you as you climb up behind him. And then the final guard requires good RNG so that he is facing a direction in a way that allows you to even attemp to get close.

In the end I feel like I did a good job to optimize this level, although there is still room for improvement, but nothing that I want to go for with this route.