Not sure how well-known this is, but there’s a fun interaction that happens in Circuit with certain abilities and the Deadly Decrees intrinsic.
Certain abilities are coded as projectiles, which you can check here: https://warframe.fandom.com/wiki/Arcane_Arachne. These abilities will scale off Deadly Decrees; they will also scale off “weapon enchant” type abilities, notably the Nourish helminth.
I’ve personally taken advantage of this with Final Stand on Styanax, Flechette Orb on Vauban, and Antimatter Drop/Antimatter Absorb on Nova.
Breach Surge sparks benefit from a lot of decrees too beyond the Deadly Decrees thing. With Nourish on Wisp and some of those I’ve been getting insane damage numbers. The crit frost hit one, headshot toxin one, probably some more too.