To get Asura, Pazuzu, and Loki you have to combine these:
Suzaku + Kali = Asura
Zenon + Shiva = Pazuzu
Zenon + Jinn = Loki
If you want the best of these monsters, go for Asura. He has 1,800 HP, which is 80 more than Pazuzu and 100 more than Loki. All of these are better than Dragon, Solion, Amon, and Kirin.