OHHHH SHEEEEEEET, they dropped their weapon

So this discussion is purely imaginary and may or may not have some relations with their backgrounds, but, and I'm wondering, if the champions were to somehow run out of ammo, mana, or anything that they'll resort to using CQC, what martial arts discipline would they have and how would they come across fighting certain others. 1v1 Ex. [Tristana, may have Spetsnaz like training (I'm saying this because I have little to no knowledge and based it off of videos, so sue me later) but when fighting others, she'd have to use her surroundings being that she's so smol. Like with Garen, she may have to do the whole Predator ensemble: Run, deceive, set up traps. Figuring that she performs faster than humans, she could be like Flash and jab his eyes out, but it may not affect the Demacian Brute.]

Have at it