Very interesting design. I like the idea of being able to switch stances in combat. I also like the healing as regen concept. I'm not a fan of the damage as dots concept, basically because if I wanted to do that I'd be on my SCH - where I would want those SCH skills returned. I could however see some delayed/compiled damage skills - similar to macrocosmos.

Also, I don't like a design based upon a forced party composition. I would rather one that is flexible, so if it is 2 "pure" healers together or a pure/barrier I'm not forced into some decision. That pure/barrier design approach becomes may become interesting to balance anyway if ever SE decides to add a 5th healer.