I think the whole ammo system for Gunsaber needs to be removed, instead let the Gunsaber's weapon attacks consume a charge much like thief's initiative. Add a new minor trait that replace [Dragonscale Defense] with "[Advanced Reload] Critical hits have a 50% chance to gain a charge while in combat." This way you can accumulate charges for Dragon trigger attacks or use it for weapon attacks outside of trigger, and maybe lower flow rate to 50 instead of 100 to balance the charges gained outside of Dragon trigger. Probably adjust the charges and rework Flow according to Dragon trigger's attack frequency. Canceling Dragon Trigger's stance retain the charges outside of Trigger stance.
[Blooming Fire] consume 3 charges, now blinds 3 targets?
[Artillery Slash] consume 2 charges, maybe increase damage to 1200 and applies 2stacks of vulnerability per hit (Main damage outside of Dragon Trigger)
[Cyclone Trigger] Consume 5 charges, should be a like binding blade's animation that shoots 5 projectiles crippling 5 targets for 2sec within 600 range
[Break Step] Consume 4 charges
[Tactical Reload] Grants you full 5 charges and refreshes Dragon trigger.