I’m pretty sure it’s the strongest build in the game. Monk/rogue probably has better damage output and definitely has greater movement, but none of the utility. There’s nothing that any companion can do, that my bard can’t do as well, or better. AOE damage was one area he was lacking, but I picked up a couple of different spells when I reclassed and he has that covered now too. I was thinking about doing a playthrough using this build without any companions as durge.
Edit: one thing he is missing is spell sculpting for avoiding friendly fire with AOE spells. The wizard is still best in that area.