all of them. very little spots to wallrun and where there are it pretty much gives you no tactical advantage at all.
only time i find it useful or see others use it is if you get blown into the air and can run against a wall to saftey
https://www.youtube.com/watch?v=qytdp4obq9ghis wallrun is very useful actually, i use it a lot
it can be used for dodging, contesting points, looking cool, getting to sniper spots, flanks, etc
at first i thought it didnt have much uses but after watching some tips on videos, it helped so much
o and in general it can help with survivability