I was thinking going with a dex based shadowmonk9/Assassin 3 for Astarian. Take tavern brawler, and use club of hill giant in off hand.
For Shadowhawk maybe a gloomstalker Ranger 5/Light Cleric 7 for some ranged and spell support. I've come to like warding flare as a nice damage mitigation.
For Minthara maybe an oathbreaker 7/Warlock GOO 5.
If my paladin ends up as an oathbreaker that works just as well, perhaps even better roleplay wise.