The Kingdoms mode in is even more challenging than the Confessions mode the game launched with, or at least at first. After all, you're starting out minus all the upgrades you're used to and haven't adjusted to the unique mechanics.
For example, 's Stress and HP healing isn't a thing at Inns anymore, which means when building your team comp, you'll want to prioritize those.
Heroes like Runaway and Crusader can be a great idea as they're more self-sufficient than some others, allowing you to better survive your long Kingdoms journey.
Apart from healing being more important than ever, the other key differences in Kingdoms are that heroes start out with a limited selection of skills, and Paths are expensive.
As such, you'll want to focus on healing and also heroes that are strong out of the gate and treat anything extra they get as more of a bonus than anything else.