How to do this (Free-to-play)

Progress through the main quest -> If you get stuck, run dungeons until you hit a wall and then use the sweep function. -> Summon allies + weapons + elite monsters, then promote and level them up. -> If the main quest isn't blocked, repeat the above. What if the main quest is still blocked? Turn off the game and leave it for a day. When you turn it on tomorrow, you'll have leveled up and your sweep tickets will be refilled lol