To strip: 4 Neutral Attacks.
To overstrip: follow by another Neutral Attacks.
To proc [Dispatch Overdrive]: Heavy Attack in any time.

Keys for different attacks by default:
Neutral Attack — E.
Heavy Attack — Mouse Button 3.

Weapon Build

[Bullet Dance] stance is highly recommended since it allows to shoot faster, which [Sarpa] needed since it has twice as lower pellets than [Vastilok].

1. [Shattering Impact] — mandatory mod in this build.
2. [Primed Fury], [Gladiator Vice] and [Quickening] to increase our overstripping speed to maximum.
3. [Dispatch Overdrive] — utility mod which can be useful to further increase our speed in case of neccesity.
4. [Amalgam Organ Shatter], [Killing Blow] to proc [Dispatch Overdrive] faster.
5. [Motus Impact] as the last impactful mod left.

Notes

1. [Motus Impact] can and should be changed to Riven mod, if you have access to it. The two and only stat you need in it is Attack Speed and negative to get better roll on AS.