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 quests or dragon tv.

For Collecting times check this.

*Dragons:*

Xmas Elf -R- #260: The path costs 860 coins.

Winter Comet -VR- #1006: The path costs 2825 coins + 1 key = 3285 coins.

Joy -E- #1128: The path costs 3630 coins + 2 keys = 6005 coins.

Murdralux -L- #1620: The path costs 6020 coins + 3 keys = 10830 coins.

Timelimited:

28 - 30: Christmas Dinner -L- #1: The path costs 8165 coins.

29 - 30: Enlightened Lapis -L- #1: The path costs 6720 coins.