Maze explanation is here.

Startbonus: 400 coins

Collections: 600 coins every 8 hours (7200) = 7600 coins.

The total does not include coins we can get from quests or dragon tv.

For Collecting times check this.

*Dragons:*

T-Rex -R- #158: The path costs 860 coins.

Cyborg -VR- #310: The path costs 2825 coins + 1 key = 3285 coins.

Supernova -E- #430: The path costs 3630 coins + 2 keys = 6005 coins.

Dystopia -L- #1494: The path costs 6020 coins + 3 keys = 10830 coins.

*Timelimited:*

02-04 - Gravity -L- #432: The path costs 8165 coins.

03-04 - Sarcophagus -L- #879: The path costs 6720 coins.