Satyrn
First Post
Hard to say. In my recently-ended homebrew campaign, it varied widely. I had some 8-hour sessions that were mostly combate and other sessions that had almost no combat. I like to mix it up and focused on trying new things rather than meeting the DMG's encounters-per-day guidelines.
I'm running Curse of Strahd now, which in seems to have a higher emphasis on social interaction and exploration. But the campagin just begun and the lesser amount of combat may be do to combat avoidance in a sandboxy setting that punishes those who don't avoid and run away from danger. I would say that in CoS it has been about 25% combat--at most.
My next campaign will be Rappan Athuk, which I expect will be 80% combat and 20% rolling up new characters.
You're forgetting that Rappan Athuk's got plenty of exploration, too.
And really, the amount of combat gets reduced considerably more whenever the players explore their way into a one-round bloodbath of a TPK.