I really hate it every time I can run away from skimmers like its nothing. From their visual design, and habitat and size and name. I always envision them being fast and dangerous animals that eat everything they come across to survive. However skimmers will only eat dropped food items according to FCS. Something, for obvious reasons I never really saw ingame. But the piles of bones picked clean in the Great Desert really suggest something else. That the local wild life is picking corpses clean.

So I made these edits.

The first objective was to get them to eat people. So I added the same eating behavior as beakthings. With the same values.Then was the speed. I looked on the wiki for a speed calculation and edited the values for their max speed to be at 60mph. Mind you, you will probably not meet a skimmer with 100 athletics with out some other mod, so that speed wont really be seen ingame.

I then decided I would also increase the speed of both spider types.Normal spiders have a max speed of 50mph whilst "small spider" has a max speed of 45mph.

In a world where spiders could be human size they could maybe move between 50-140mph based on their movement speed as small creatures IRL.Also when I was in Egypt I saw this crazy species of ant that were like 2-3 mm long but moving at 1-2 meters per second. This was maybe why I assumed the desert insects to run faster in Kenshi.