This is a 6 Forma build you might say its quite much but actually its not if you like accuracy over projectile speed.

One of the reasons why I chose Directed Convergence over Terminal Velocity is that we do have a Heavy Caliber mod giving us +165% Damage, -55% Accuracy. More fire rate resulting for the weapons recoil harder to control. Its not much but it really does help. By adding [Directed Convergence] instead of using [Terminal Velocity] quite eliminates the inaccuracy of the weapon making it very effective on longer range.

5 forma is enough but if you are planning to use [Directed Convergence] instead of [Terminal Velocity] then you really have to put Naramon Forma for Vile Acceleration.

Another option to limit this weapon's forma to only 5 is to switch the positioning of mods - [Vile Acceleration] being placed on the first mod slot and then swapping Infected Clip to Malignant Force making the capacity limit reach exactly at 0/60 so there's no need to go for a 6th forma.

If you prefer [Entropy Burst] over [Vile Acceleration], this build would still allow you to do that however instead of having [Directed Convergence] you have swap it out with [Terminal Velocity] in order not to exceed the allotted mod capacity.