Hot hot hot! Thanks to u/brickbosss on Reddit for this build which has kept me going waiting for other builds to emerge.

The [Cantare] are designed as a support weapon, with the cool buff of giving you increased reload speed which has benefit for your allies using their own weapons, and yourself even when alone as [Cantare]'s unique reload involves drawing the blades back with guaranteed red crits while you do it!

This is a build for the [Cantare] that is good for providing quick burst damage while also providing you with the reload speed bonuses from the weapon itself. You can run [Frostbite] instead of [Ice Storm] but I wouldn't recommend this as you already have fairly high status chance already, while also providing you with 2 extra rounds to give you more damage as you draw the blades back in. Do bear in mind that [Synth Charge] will still work without the extra blades, so feel free to experiment if you want to but want to retain [Synth Charge].

[Synth Charge] appears to treat the drawback effect as the "final shot" including the last actual blade you throw, which then boosts the overall damage it does while critting. It also allows you to reload your guns if you're running something with low magazine caps like the [Zarr] or any snipers without having to switch back to it until you know you've got enough ammo which helps if you run out of ammo fast. The [Cantare] also has unlimited ammo in practice which makes it a capable sidearm when you're running weapons with low ammo maximums.

There is probably room for improvement on this build (particularly [Hornet Strike] probably being better served by a Bane of (X) mod instead depending on what you're fighting) but you cannot go wrong with this and it is very viable vs standard SP enemies regardless of enemy type. Enjoy!