Gonna give you a hand since been messing with Gwyn for a very long time.
With Gwyn you have to decide, are you focusing on:
Knight tribal (aka knight that buff other knights plus token);
Sunforger (aka alot less knight and more the usual
Sunforger Spells, with a splash of Black.)
Voltron (with the usual infect)
Or what I am doing, which basically Wheel/ Reanimation/ Control.
Else it all falls apart.
I suggest focus to a direction and not try to go all directions at once.