As note I decided picking archetype is free but if want any features you need pick them as sub feature choice in given levels. So any ideas what your other class archetype is going to be? I imagine Guan would go either Hunter or Monster Slayer conclaves (Hunter is more weapon mastery while Monster Slayer gives some useful tricks vs monsters and casters alike). I imagine the red gaze from Goblin Slayer for using Slayer's Prey feature :P.