Death spiral is a very nice skill for burst-applying vulnerability, but vuln isn’t particularly hard to come by, and in a group is probably going to always be max stacked anyway.
I was thinking it would be nice if the skill gained an additional interaction with vulnerability, causing it to do deal (significantly) more damage for each vuln stack already on the target at the time of the skill’s cast, but maybe also increasing the cooldown.
the numbers i had in my head were something like 5% extra damage per vuln stack and 0.5sec added cooldown.