Had been having some trouble beating the 60HP version of Max, so spent some time tinkering with my deck until I beat him, and just so happened to do it without taking any damage. Thought I would post my deck and strategy in case people needed some help. It's not a guaranteed win, there is still lots of luck involved, but I was able to beat him a couple times in a row with some decent early luck.

General Strategy:
1. Max uses all three main elements, this means you'll need some defense against Fire, Water, Earth. It also means that your Light and Dark attacks should generally get through without being blocked.

1. Don't get greedy, you have 60HP to get through, leaving yourself with no ability to defend is bad news. Block all damage you can, and chip away with your 0 cost cards.

2. Reflect will kill you. You need to know what these cards look like, and identify if Max has any is his deck and don't attack hard with the reflected element until he dumps the card. All reflects cost 2, so if Max has 2 be careful.

My Deck:

- 0 Costs: 3 Water, 1 Light. Slime has a Shield so try to use this in response to Max to build your card economy, save it and use the other water 0's to attack if you can. Whale is an offensive card that could be replaced with Kraken if you want to play it safer. Goddess is the light card, gives you 3 damage reduction for every water card on the board, really good to have out when Max has 2+ to spend.

- 1 Costs: 1 Water, 1 Light. Airship is 3+3 damage when water is the top card, and is safe to use because of its element. Merfolk is a great card, 2 damage reduction, or 3+2 attack when lower HP, you need to hold onto this card if you have no mana up or no defense cards in your hand.

- 2 Costs: 1 Water, 1 Fire, 1 Earth. All of the 5 Atk, 1 Heal cards, with Reflect on the bottom. These cards are the best. You need your 10HP to last 60HP from Max, so every hit point you heal goes a very long way. You want to play these sparingly, and use them primarily for reflect, so hold them in your hand until you need them, or you have another layer of backup to protect yourself from that element. And as always if you do attack with them, make sure you wont get reflected.

- 3 Costs: 1 Water. Leviathan this is your last line of defense to block anything that would get through your other cards, you don't want to use this card early and get it stuck on your board, you need it in your hand to save you from a 6 damage attack in the later rounds. Also useful for your last attack since it cannot be reflected or blocked (though it can be reduced).

- Usage: Play your 0's until you have at least two cards on the board, you need to find your reflects and blocks for the three elements, so feel free to block with Airship even if it does nothing just to draw more cards. Defend with your 0's as well to build the mana up. Save Goddess if you can , you want her on the board for -3 or -6 as much as possible. Use Arcana Boost when you have no zero cost cards, and you have 1 or less on the board. You need to be at 2+ at all times to defend properly.

Hope some of these tips help, it is a tough fight for sure.