Kol Raider Scouts are essentially just Raider Scouts, except they have a nasty habit of setting themselves on fire when they're defeated. You can avoid this entirely by killing them using a stun finisher.
Raider Scouts make use of a sling to hurl projectiles at Kratos. They're pests, but once you get in close, they don't have much to offer. Avoid their fire, and then let loose with a barehanded combo to stun them into submission. Their stun bar fills very quickly, so this shouldn't be much of a problem.
The only thing to watch out for is a Scout's melee attack, in which they swing their sling in a desperate fashion. It's a slow attack that can be easily dodged, but if it does hit, it gives them an opportunity to run away.
How many Kol Raiders Scouts have you smashed into submission? Be sure to check out our full God of War Ragnarok guide for information on how to beat every enemy, and much more.