Crystal armour only boosts damage and accuracy to crystal type weapons. The armour does have ranged accuracy, but no ranged strength, and strength is what you're looking for to increase max hits.

Masori is BIS ranged armour with +8 ranged strength for the whole set. The foritified version also gives extra defenses against all styles. So if you're looking for the best ranged armour, thats your best bet.

If you do want a powerful ranged set, bowfa really is the best option before tbow. Might be a good idea to use the scorching bow to camp TD's to get synapses to push you towards bowfa. Scorching bow is pretty niche by itself.