With a little over 20,000 Primogems, today I was blessed with both Columbina and Ineffa. Now I have a few questions regarding their team, and what should I aim for - Their Signature weapons or their Constellations?

Within the 7th 10-pull, I got both Ineffa and Columbina, once each (both C0), by pulling on their individual banners. I might have wasted the rest of the primogems by trying to pull on their weapons banner, but I didn't receive their weapons, however, it might not have been a complete waste, though, because I got refinements for some of the weapons I use and constellations for Fischl, too. There are three viable weapons I already have in reserve are Blackmarrow Lantern, Prototype Amber, and Primordial Jade Winged-Spear. I've leveled all three of them to level 90 already. Now the question is, from here on - should I spend the new primogems I get on for signature weapons or aim for their Character copies/Constellations?

Also, since they are both Nod-Krai characters, both of them will complement each other on the same team; so the next question is - who could be the other two characters on their team? Does Dendro Traveller and Bennett look good?