Varka Investments

Currently I have Varka C0R1, I don't have Durin and I'm going to get both, would it be more worthwhile to try to get some constellations from whom? Or weapons?

I know that ideally Durin's C2 is ahead of Nicole's C2, but I don't know if I have a good weapon for them. I have TTDS, and Lost Prayer for Prune/Nicole and I intended to use Light of Foliar Incision or Skyward Blade for Durin. In my case, after getting both, what would be more worthwhile, going after constellations or weapons? I'm at pit 0 but I have 350 wishes.