Bronn The Thundercaller. Update 11.
We reached the 11th level. Amiri got her last (5th) fighter level for Weapon Training (Polearms), Valerie started her path as the Stalwart Defender. But before that, we followed and completed the Season of the Bloom questline. No big challenges there, although we had to be extra careful not to get overwhelmed.
That said, a Greater Owlbear-like Treant could end the run if we continued to be too self-confident.
However, all ended well when an enemy hydra became a dog.
The approach where we first complete quests, then spend time on Kingdom tasks, has continued to work. We finished the Season of the Bloom with 190 days left until the next Baldhill attack. In 100 days, we were able to add all available regions, build all the needed artisan shops and do all their quests (so far). And we still have 90 days left. Here is how our Kingdom currently looks.
We don't feel there is any kingdom task that we don't have time for. We usually don't have bad odds for solving problems, and we have enough crisis points. So I think the approach where you don't force the kingdom stuff early in the game but instead get into difficult encounters works very effectively (the Kingdom management is on Normal).