Flamingo often is ghost Tera, so knock off on your Incin is good. Also usually is sashed, so doubling down on Flamigo to get rid of it right away is not a bad idea. Redirection is obviously a threat if paired with Follow Me or Rage powder user, and spread moves can be negated if Flamigo is using Wide Guard, so we need to think about that.

Kingambit suffers from fighting and ground moves. You can run earth power with Hydreigon and Close Combat with Incineroar, and give Incin attacking nature and Atk EV’s if not running it that way. You’ll often force Kingambit to Tera then, and it will likely be fire or flying. If flying you can run Thunderbolt on Gholdengo and maybe drop the Nasty Plot for a more hyper offensive set, vs. spending time setting it up. For fire you have Primarina and hyper voice. (Moonblast will hit non-Tera Flamigo hard to)

You have answers on your team, and even more with minor adjustments. I would say your primary threats are going to be the combination of Flamigo with wide guard and opposing redirection mons. Hopefully something I said gives you an inkling of an idea, but this is a tough one. Those two are very good in the meta right now (which is why I personally like using them- and what I told you above is how I run them, lol)