Wife and I are looking to duo Carin. Any advice on what the best duo classes/hybrids could be for that fight?
A Condi quickbrand and a heal ren should be able to do it easy.
Or if you look up mightyteapot, he did a duo on a strike with a condi ren build that build would also work for cairn as well.
You could also look up pylon kite scourge build and 2 of those should be able to do it as well, they take the trait to heal on condi dmg.
Basicly anything that can output a decent amount of condi pressure with good sustain should work for you.
Why would anyone want to duo Karen?
My best suggestion is to run a Quickbrand as one of your builds. It pretty much covers all of the offensive boons (other than Alacrity) by itself.
Progress isn't made by early risers. It's made by lazy men trying to find easier ways to do something. ~ Robert Heinlein