The Power of the Sun and Moon

Use Dawnwalker or Duskwalker's effect to synchro summon Inti or Quilla.

If that is not an option stall with some cards

Cycle through your deck with sangan and stall with traps (they all stall in some way)

Equip power of the guardians to monsters you want to keep on the field and use world legacy clash only when needed.

REMINDER: All of the monsters are for Supay and Fire ant Ascator to summon Inti or Quilla respectively.

Monster:

Ascator, Dawnwalker x3

Supay, Duskwalker x3

Oracle of the Sun x3

Apocatequil x3

Sangan x3

Fire Ant Ascator x3

Supay x3

Spell:

Power of the Guardians x3

World Legacy Clash x1

Trap:

Counter Gate x3

Draining Shield x3

Floodgate Trap Hole x3

King's Consonance x3

Wall of Disruption x3

Extra:

Sun Dragon Inti x3

Moon Dragon Quilla x3