For context, I stopped playing in mid sumeru and I returned to play in 6.0, so I don’t have a lot of the newer 5\* (only furina, mualani and ineffa)

I will 100% try to get columbina, as she is one of my favorite characters in the whole game, but when do I do it? I’m currently at 5 pity, so should I grind till the end of her banner or save?

She is considered like the archon of this region, so she will get a rerun really soon, so should I prioritize getting other characters before? And if so who?

The only nod krai characters I’m interested in are maybe flins and durin.
So, I lost my bina 50/50, what should I do?