I used to take those 4 followers with me all the time. But I find Kaidan's brain tends to break and he kills Auri or gets into infinite sword fights with Lucien or Inigo. A shame too, cause he has some great dialogue with Lucien and some great quest-specific dialogue. Such as this quest and quite a few others, like the Companions.
Not sure if You heared about Relationship Dialogue Overhaul but if You install MCM addon fo it (require SkyUI) You can use calm via hotkey so everyone around You stop fighting for a while. It's the simplest solution for friendly fire.
I know right?! That would be hilarious! That would be so funny plus if you are an alchemist then you would get free hag raven feathers out of the deal!
Put him in the bed with the captions daughter, Put him in the bed with the captions daughter, Put him in the bed with the captions daughter early in the morning