I completed Balance and Tactican in multiplayer, Tactican also solo. I completed Honor Mode 3 times solo and 1 time in multiplayer. My 4th solo is in Act 3 and is waiting for me to install all the mods.
I often made mistakes, almost always Act1, once with Kethric in Act 2 and Act 3 I never lost a run. I delete lost runs, I'm not interesseted in playing in another modus.
For me the challenge is just fighting with Astarion in a duo, using every dirty trick and don't avoiding any danger. I try to deliberately provoke as many fights as possible, pickpocking ist the best way to unleash chaos.

For me the greatest fun is fighting my way out of such situations and having to think tactically.