The ‘Vorpal Reverberation’ node (40% more damage with Abyssal Echoes at 5/5 points) does not seem to be increasing the damage of the abyssal decay ailment at all. Damage-over-time ticks seem a bit inconsistent, so I also tested with the ‘Impair the Weak’ node. With this setup, the damage numbers between 1/5 and 5/5 points in ‘Vorpal Reverberation’ were identical.
For reference, the ‘Vorpal Explosion’ node (80% more damage with Abyssal Echoes, but no longer chains) seems to be working as intended with or without Impair the Weak.
This was tested on an enemy training dummy in full offline mode.
Thanks!