Is this a valid way to do self poison?

I was thinking of using self poison in combination with the sextants to get a lot of damage and movement speed, but all guides on how to do this use the assassins. My build uses the golden rule in combination with the slayer ascendancy, hemophilia and the red rail to sustain frenzy charges. But I was thinking of allocating "swift venoms" since it only requires 3 passive points. Is this worth it?

if my calculations are correct:

I have 7 attacks per second

With the passive allocated I have 20% chance to gain poison on hit

Attacks are supported by melee splash.

Attacks are supported by multistrike

In a group of enemies I hit 8 enemies on average

poison lasts 2.1 seconds

so on average I will gain 7 * 0.2 * 8 * 3 = 33.6 poisons per second

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33.6 * 2.1 = 70.56 poisons on average on me granting me:

70.56 * 12% = 846% increased damage

70.56 * 6% = 423% increased movement speed

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All of these stats are without headhunter buffs, which might increase attacks speed, thus increasing the poison.

current build including swift venoms:

https://pastebin.com/GA3fYgQs