This is in my book, best *3 worth to keep:
Red: Rudolph, Squire Wabbit, Namahage, Hawkmoon, Nashgar, Azar, Jahangir
Blue: Gato, Valen, Ulmer, Gunnar
Green: Muggy, Belith, Brienne, Berden, Mnesseus, Hisan
Yellow: Bane, Melia, Kailani, Gan Ju, Arman
Purple: Balthazar, Gill-Ra, Chochin, Tyrum
Just like other said, focus 1st for next event challange which is reflect.
- September 12 - 15 (Avalon - refelct blue), so focus Green 1st.
- October 10 - 13 (Pirate - reflect purple), next focus Yellow.
and the rest:
- Wonderland - reflect green, focus Red.
- Grimforest - reflect red, focus Blue.
- Guardians - reflect yellow, focus Purple.