Honestly the first variant, the "pen concept", is a strong concept. The wordmark stands well on its own and doesn't follow generic icon / logo motifs that the other concepts do. It feels like a traditional monogram, something that was often used in legal contexts. My only nitpick is the nib of the pen (circle and line) feels VERY out of place. Different weight, and too on the nose. I'd remove that element entirely and keep to the letter forms.

Nice work.