I use Karacha Crossbow, however most crossbows here will work fine. The only time the crossbow should technically be out is during Retreat Shot, however depending on how much you rely on Mana-mana’s additional critical rate, you may use crossbow while dealing with grounded mobs.
It depends on your weapon funding, but with low funding a strong bow covers all bases.
If you’re able to reach sufficient critical rate with a bow, a good bow with high physical damage (Light Gorithos is best efficiency to affordability), then you can use it for all mobs unless you need pistol out for Retreat Shot, pending you take SR C1 at R7.
Light Gorithos is better over crossbow and pistol as well as Khasti Bow even at high critical hit because of how Split Arrow’s bonus damage is factored. It does not take anything into account except for base damage of skill and physical damage, excluding details like elemental damage and critical hit.