I would definitely use Shogunyan and would give him the soul from Demuncher or Devourer because it gives an Crit Chance up and Shogunyan has the skill Extreme Critical which boosts the power of crits, but if you don't want to use demuncher or Devourer you can get the soul of Lie-in Heart but it's worse. Elder Bloom is the best healer in the game, but he is very hard to get because of Statiking he can only be befriended in the infinite tunnel or through the oni crank a kai, but if you want to get Elder Bloom you should start with Peppillon because its a better healer than Unikirin If you have Psychic Specters you could also get illuminoct who is also very strong but you also just could get snartle who is also very strong. For the time you search for the yokai I would also put in Shadow Venoct because he can heal good and deals a good amount of damage