How does vargottama work

I do not apply vargottama to nodes as being very significant. How well they do in the sign is based on the wellbeing of the lord of the sign and planets in that sign. 

Planet DB but exalted in navamsa is not vargottama, its something that helps to restore the damage to a DB planet. 

In the context of that varga, yes, it benefits from a jupiter conjunction, but only in the context of that varga.