Maybe because her sp1 is an instant damage where as the relic says DOT.
Wording can be tricky (DNA or others could lend a hand), but I believe “effect” would encompass both a Debuf as well as a Passive. And both of them would fall under the category of DoT for those listed above (poison, etc)Difference between that and Viv's normal ability is Viv's listed as “instant” then is direct instantaneous damage, not an actual icon’d Debuff or Passive Effect. So not DoT either.