Used bandit captain as a place to start - though studded leather sounds like a good armour for a rider anyway. Lance/scimitar and...what would a one-eyed person use as a missile weapon? A sling with an AoE type effect missile maybe? Also pondering - replacing Parry with some similar manoeuvre to zest combat...but what?
I'd been mulling this over and decided it'd be better to give the Griffon Rider some means to circumvent its
Poor Depth Perception.
Came up with two approaches.
First Approach: Give them some special ability to focus on a target that cancels out the disadvantage. I was thinking:
Eye of the Eagle #1. The griffon rider selects a target it can see within ### feet. As long as the griffon rider maintains concentration, it can attack the selected target without disadvantage on attack rolls from its Poor Depth Perception. The griffon rider can end this effect as a free action, literally in an eye blink.
Or alternatively:
Eye of the Eagle #2. The griffon rider selects a target it can see within ### feet. As long as the griffon rider maintains concentration, it can attack the selected target without disadvantage on attack rolls from its Poor Depth Perception. The griffon rider can end this effect as a free action, literally in an eye blink.
If the griffon rider uses Eye of the Eagle when it's already concentrating on a target, it gains advantage on its next ranged weapon attack roll against the target.
EDIT: Hmm, The above wording could do with some tweaks.
Eye of the Eagle #3. The griffon rider selects a target it can see within ### feet. As long as the griffon rider maintains concentration, it can attack the selected target without disadvantage on attack rolls from its Poor Depth Perception. The griffon rider can end this effect as a free action, literally in an eye blink.
Should the griffon rider already have an Eye of the Eagle target when it uses Eye of the Eagle, the griffon rider gains advantage on its next ranged attack roll against the selected target if it still has concentration.
Second Approach: Have its distance attacks use spell attack rolls instead of weapon attack rolls. That's the reason I specified "weapon" in
Poor Depth Perception.
If the Griffon Rider had warlock like powers and fired
Eldritch Blast style beams from its eye, its monocular inaccuracy would not matter.
Or we could do both!