Dragon Age Inquisition Nightmare AI Party Tactics Help

I'm returning to DAI after a long break and was wondering if anyone had any suggestions for how to use the AI tactics interface on Nightmare difficulty with a party of an Inquisitor Assassin Archer, Blackwall, Varric, and Solas. I'll be building each of them traditionally for their classes. Back when I last played, I controlled every battle via the tactical camera, so I have little experience with using the tactics interface in this game.

Any help is appreciated!