I like that my dots are buffed, however the passive shouldn't be kept in line with standards, they should just be up to standards, this buff isn't a passive buff, it's just a placeholder.
My proposal is give me something like necromancers, something to do more DoT damage ( since my class is about attrition as you say ) in execute

Secondly, Eruptions cost is too much and doesn't output enough damage nor does the passive it gives me for stam/ult regen worth it because it's only every 18 seconds ( passive is for 6 seconds but it doesn't do me much good since I only refresh it every 18 )
Make the passive give ult every 6 seconds on -damage- or -affect-, then I would find the cost worth it, otherwise give it a burning enemies do more damage like elemental wall.

Thank you for your time.