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.
Thank you for mentioning that list of projectile abilities. I was actually looking for that the other day and didn’t think to look on the Arachne page. Wanting to also test those with the Mutalist Quanta bubble.