This is what I use for general PvE.
Red 3x Abreh Melinn - 10% Fire Dmg each (can be replaced with any of the type specific cards so not really a priority. Just nice to have for general PvE.
Blue 3x Phelixia Card - 4% Decrease Dmg from Boss each (use Zaura or Nuaele until you reach the point where you don’t get killed by mobs anymore)
Green 3x Lucia Card - 40 INT each (nothing else should be here really)
Purple
Gazing Golem - 10% chance of getting Pain Barrier buff when attacked
Stone Whale - 3% chance to get a 10% damage reduction buff for every attack you make
Velpede - 3% chance to get MSPD +4 for every attack you make
Legend Marnox - at least at Lv5 for that 10% minimum crit chance, otherwise, replace it with a Legend card appropriate for the boss/type you’re mostly fighting against