I see forum feedback on Plague Star saying that it needs to be more efficient than 4? 12? plat (I forget if it is 4 or 12) per 8 minutes. Where does that figure come from?

Right now I'm using Gyre to make it an "AoE" weapon with Cathode Grace/Rotorswell/Cathode Current, since this always crits, but single targets are intended to be killed by slash procs. I'm using a Panzer Vulpaphyla for Viral primer. I stacked base damage for the Hunter Munitions slash procs. I'm using Primary Merciless with the intention of bleed effect kills counting, but I'm not sure if they proc Primary Merciless or not. Incarnon mode feels like it shortens TTK but not by an extreme amount.

The riven's effects on the current build are visible in the display.

Some specific questions:

Should I be using Hata-Satya here? What would you remove?

Thoughts on what I should subsume over Gyre's 1? Tharros Strike seems redundant with the concept of slash procs even though it turns things into swiss cheese anyway. Roar is a staple (and I guess it would help rotorswell), but is there something else? Maybe Nourish for viral and using a sentinel companion for the vigilante set's chance to enhance critical hits? Of course I don't have Grendel yet so that'll be a bit of a chore :)

Are there other warframes that might work better to make up for Soma's single target style?

Should I swap out Critical Delay, since the riven on its own puts me at 93.4% crit (plus Cathode Grace), or is the extra 60% for 7.9x normal/8.8x incarnon worth it?

Is the riven as good as it seems, or would you re-roll? What would you look for?

I don't think the status is high enough for the new cold procs to help, or I would consider those.