There was a change to siphon slider (assault) and vicious placebo (tactician) buffs only for this next raid. They allow the DoTs to scale with role force for the ticks while you're hitting the opponent. I hear they are quite good, but would need to see them in action first.
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But mentions only if defender has 5 Debuff Siphon inflicted (?)
https://forums.playcontestofchampions.com/en/discussion/392905/nightmare-raids-round-2-full-changelog#latest