been thinking about it for the last few days, looking into all the bowgun ammo and such. Normals and pierce have synergy with crit boost, elemental/sticky wont really use crit boost.

Tobi gun has decent sleep and is a meta pierce HBG, doesnt really need reload and needs 1 recoil mod for the best recoil on P3. Low raw. Power/recoil/scope/wyvern/shield

Bone line also has sleep and is a decent N3 (recoil2) gun with decent raw. Possibly the best option overall for the most versatile weapon if you wanted to also utilize Wyversnipe mod. Dunno if it needs 2 recoil mods or not.

Styx is recoil 3 with spare shot, sleep and snipe, recoil 3 really sucks

Zorah HBG is pretty good, but shitty reloads on sticky if you are using scope+wyvernmod, also a good fire bow (Velk ice hbg also has sleep+wyvernsnipe/recoil 1 ice) for what thats worth, recoil 1 fire = more mod slots essentially. Recoil/recoil/wyvern/scope/power(?)

Shara HBG is awkward with only 1 shot of sleep ammo and auto-reloads, potentially THE best option if you could get a sleep off in the time the flash gives you. High raw, not base crit for P3, auto-reload and shields don't really mix. This is a usable gun with fewest mod slots needed of all the guns, however if you still need free element to add a sleep shot to make it work, whats the point if you can't fit in crit boost? I guess you don't really need spare shot. This is the gun if you want to see the biggest number though. Maybe Crit draw (and lots of damage mods) + snipes? If snipes take advantage of those that is.