I'll go with the methodical 6 for the calculating Kray.
Taking maneuvers Evasive Footwork (more effective positioning/survivability for Kray) and Commander's Strike, which should open up some tactical options, bringing focused attention (aka death and pain) to those NPC's in need of it more imminently.
Thinking Evasive Footwork upgrades the D I love on Kray while keeping him mobile (taking Defensive Duelist at L8 Fighter to further the D) while C-Strike gives us those coordinated attacks on targets that need to go down asap, especially with two Rogues Bryn and Iasu.