Plaguebreak and Draugrkin are two good ones. Plaguebreak explodes on the death of a foe turning them all into mini bombs, and Draugrkin would make a DoT build truly shine in boss fights.
I said this somewhere else, but for necro dots Id go swamp raider. Most stuff is poison / disease, and its gonna buff your skull and blastbones too. Maybe I'm missing something? Did bleeds get a buff?
I'm minded to try a sort of swamp raider and either plaguebreak or draugrkin set up on mine. The issue is ofc dots, but then you cd go bow for poisoned/defile off lethal arrow, poison arrow, arrow spray and with the brp bow scattershot dot.... Might work.
Plaguebreak and Draugrkin are two good ones. Plaguebreak explodes on the death of a foe turning them all into mini bombs, and Draugrkin would make a DoT build truly shine in boss fights.
I think they are looking for something that buffs DoT damage, not a proc set. Even then I would expect a set that increases your actual damage as the 5pc bonus would perform better than a proc set. Unless that proc set provides an increase in damage stats.
With that note, unless the build is pure DoT then I would not suggest a set that buffs DoTs only. Just a thought. Mother's Sorrow will buff all of your damage and is easy to obtain.