I run a full DoT build with WoF/Draugrkin/Vat Ice/Maarselok with Serpent mundus on Arc and it works great. Basically the same as this but a little less tanky.
I mean, the build isnt bad. the problem is that you were fighting against another jerall too + some dot cringe. 10% healing reduction from draugkrin, 15% from your jerall, 35% from the other player's jerall is a bit too much to sustain. Also dragons appetite works well only with cutting defense blue cp on arc imo.