The first is Garuda it is necessary to use make it the main monster.
Using his Piece level up all his skills to the max level.
-First skill decrease the cooldown of your skills and skills of your monsters by 32% so you dont have to wait in your fight.
-The second skills is for healing you and your monsters.
His skills cost mana, so you need to max your mana Echance Skill. you need 10 stock of mana to use.
Go to Enchance Skill level up Mental Discipline to level 3 and Concentration to level 4.
(You can use Light Garuda if you have,is better in healing.)
Then definitely you need a monster with strong hitting skills (DPS).
Using 5 star Selection Ticket chose Polar Queen If you used all the free tickets, you must purchase new Summoner Pass.
Level up polar queen to awakening level 5 and level up all his skills to max level using Devilmon.
-First skill damage is 1112% + Effect: damage taken +30% for 17 sec.
-Second skills damage is 679 +30% again Boss the skill penetrat 50% of boss defence.
-Ultimate with 1990% of damage the skill penetrat 60% of defence and +100% of damage again Boss.