Maze explanation is here.

Startbonus: 400 coins

Collections: 600 coins every 8 hours (5400) = 5800 coins.

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

For Collecting times check this.

*Dragons:*

Elements -R- #237: 860 coins.

Dreamgaze Emerald -VR- #1324: 2825 coins + 1 key = 3285 coins.

Samba -E- #381: 3630 coins + 2 keys = 6005 coins.

Orange -L- #1490: 6020 coins + 3 keys = 10830 coins.

Timelimited:

16 - 18: Alebrije -L- #1310: 8165 coins.

17 - 18: Carnival Queen -L- #1263: 6720 coins.