Targeting players that are wearing specific items.

Hi there. I'm looking for a method to check if the target is wearing a particular piece of armor or tool (can be Mythic, or not). Is there a method you can use to check the targets slots to

If said check is true, modify the FollowRange option to be increased and change the ThreatLevel of the target.

I'm going to assume scoreboards come into play, to which I've not had much experience with scoreboards, so I'll need some help/advice.