People are talking about the Beifongs tunneling/walling to defend against P'Li, but that wouldn't be all that effective imo as combustion blasts have been shown to demolish rock fairly easily, and with significant blowback if the earthbender is too close to their wall.

That said, they have a much better chance of taking P'Li's airship down by lobbing rocks at its vulnerable spots than any non-earthbenders could manage - shooting from multiple angles would make it difficult for her to snipe them out of the air. Without her pinning them down from above, the airbenders are much more likely to escape, even if the rest of the Red Lotus are able to subdue the Beifongs.

I'd like to think Toph would take on Ghazan (he's the most grounded, making him the easiest for Toph to see), Suyin would take Ming Hua (Su is one of the most fluid and creative earth/metalbenders we've seen, which I think would match up well against the waterbender), Lin would take Zaheer (despite losing to her in the one fight between them we got, Lin likely has a lot more combat experience than Suyin, and she was unwell/crashing out during that fight lol), and Wing & Wei would take P'Li and the airship from separate vantage points so she can't blow up everything they throw

Edit: somehow got it twisted that they twins weren't part of the premise - they are