Arcanes are not required for this build

You can use secondary merciless, [Galvanized Diffusion], [Lethal Torrent], and [Pistol Ammo Mutation] to arm yourself and fight with this instead of the chakkhur if the situation really doesn't need to use the primary weapon

Stunning speed and galvanized shot are important as they provide with necessarily high status chance to proc the following:

• Corrosive to lower enemy shields, preferably up to 85% of the armor removed (affects grineer ferrite armor)
• Blast to lower enemy Machine armor and cause inaccuracy
• Heat to have increased damage against organic enemies, and cause them to panic

[Gunslinger] and [Stunning Speed] allow the [Akarius] to be rapid fired to proc quickly then switch to chakhurr for main damage