If a class, what does level 1-3 look like?
I kinda figure subclass at level 1 or 2, because the theme of the archer needs to come in quite early.
Fighting Styles? Perhaps a couple new ones, Archery, Thrown Weapons? Is this where Point Blank Shot (damage bonus when shooting at close range) and Rapid Shot (bonus action shoot or an extra shot when you crit or down a target?) could live?
What about a Fighting Style that lets you move 10 feet every time you use a reaction of any kind? Does that have legs, at all?
Anyway, my initial thoughts are:
Hit Die: d8 (I’d be willing to go d6 even, but this is a warrior so it shouldn’t be too squish)
Saves: Dex and Strength?
Skills: I’d go for 3 skills, but maybe 2 and a tool like monks? Athletics, Acrobatics, Perception, Stealth, Animal Handling, the rest is gravy.
Weapons: all ranged weapons, simple weapons, and maybe 1 melee martial weapon?
Armor: Light only, no shields
Level 1, Fighting Style, defensive movement ability, ribbon
Level 2, Archetype so big that 1/2 casting can fit?
Level 3, Stances