Vaal rf in addition to regular righteous fire

If I have regular rf active thus burning nearby enemies, and then activate vaal righteous fire, will I be burning enemies for both of the skills, or does vaal rf override the regular one? E.g:

Normal RF dps: 1 mill
Vaal RF dps: 2 mill

Total dps during vaal rf is 3 mill or just 2 mill?

They are different skills, their dps sums up.

Thanks