Easy deck:
Turn (health): My card (stats <bonus>): Opponent card (stats <bonus>): Result:
1 (20/20) Emperor Charlemagne (3-5) Viking Plunderer ( 1 HP, 1-2 <+1> dmg) 2 dmg, opp. killed
2 (18/20) Marco Polo (3-5 <+3)) Warrior Hoplit (2 HP, 1-3) 3 dmg, opp. killed
Card Shop: Drain (1 HP heal + 1 HP opp. dmg); Weaken (25% opp. HP reduction); Chaos (opp. self dmg) == Chose Chaos
3 (15/20) Leonidas I. (1-3) Hua Mulan (3 HP, 2-3 <+2>) Redraw (5 coins)
4 (15/20) Chaos Hua Mulan (3 HP, 2-3 <+2>) Opp. 2 dmg
5 (15/20) Geisha (2-3) Hua Mulan (1 HP, 2-3) 2 dmg, opp. killed
6 (13/20) Ulysses S. Grant (3-6) Leonidas I. (3 HP, 1-3) 1 dmg, opp. killed
Card shop: Healer (6 HP heal); Drain (3 HP heal + 3 HP opp. dmg); Sacrifice (3 HP loss, opp. self dmg x 2) == Chose Healer
7 (12/20) Medusa (3-5) Joan of Arc (8 HP, 3-6) 6 dmg, opp. 3 dmg
8 (6/20) Cleopatra (3-6) Joan of Arc (5 HP, 3-6) DEATH WARNING - Redraw (5 coins)
9 (6/20) Healer (6 HP heal) Joan of Arc (5 HP, 3-6) Heal 6 HP
10 (12/20) Viking Raider (1-2) Joan of Arc (5 HP, 3-6) 5 dmg, opp. 1 dmg
11 (7/20) Joan of Arc (3-6) Joan of Arc (4 HP, 3-6) 3 dmg, opp. 3 dmg
12 (4/20) Pythagoras (3-6 <+3>) Joan of Arc (1 HP, 3-6) DEATH WARNING - Purchase Heal 10 HP (85 coins)
13 (14/20) Pythagoras (3-6 <+3>) Joan of Arc (1 HP, 3-6) 5 dmg, opp. killed
14 (9/20) Ada Lovelace (3-4 <+3>) William Wallace (8 HP, 3-4) 3 dmg, opp. 7 dmg
15 (6/20) William Wallce (3-4) William Wallace (1 HP, 3-4) 4 dmg, opp. killed
Card Shop: Weaken (opp. 75% HP reduction); Healer (8 HP heal); Drain (5 HP heal + 5 HP opp. dmg) == Chose Drain
16 (2/20) Jester (1-2) Ada Lovelace (7 HP, 3-4) DEATH WARNING - Redraw (5 coins)
17 (2/20) Drain (5 HP heal + 5 HP dmg) Ada Lovelace (7 HP, 3-4) Heal 5 HP, opp. 5 dmg
18 (7/20) Beethoven (4-5) Ada Lovelace (2 HP, 3-4) 3 dmg, opp. killed
19 (4/20) Cleopatra (3-6) Sir Lancelot (10 HP, 5-7) DEATH WARNING - Purchase Heal 10 HP (85 coins)
20 (14/20) Cleopatra (3-6) Sir Lancelot (10 HP, 5-7) 6 dmg, opp. 3 dmg
21 (8/20) Leonidas I (1-2) Sir Lancelot (7 HP, 5-7 <+5>) DEATH WARNING - Redraw (5 coins)
22 (8/20) Oracle of Delphi (2-4) Sir Lancelot (7 HP, 5-7) 6 dmg, opp. 2 dmg
23 (2/20) King Minos (3-4) Sir Lancelot (5 HP, 5-7 <+5>) DEATH WARNING - Redraw (5 coins)
24 (2/20) Jester (1-2 <+1>) Sir Lancelot (5 HP, 5-7) DEATH WARNING - Purchase Heal 10 HP (85 coins)
25 (12/20) Jester (1-2 <+1>) Sir Lancelot (5 HP, 5-7) 6 dmg, opp. 2 dmg
26 (6/20) Leonidas I. (1-3) Sir Lancelot (3 HP, 5-7 <+5>) DEATH WARNING - Purchase Heal 10 HP (85 coins)
27 (16/20) Leonidas I. (1-3) Sir Lancelot (3 HP, 5-7 <+5>) Redraw (5 coins)
28 (16/20) King Minos (3-4) Sir Lancelot (3 HP, 5-7 <+5>) 12 dmg, opp. killed
Deck finished: 370 coins spent, 20 GP points earned, cards remaining: 1 (Leonidas I.)
I can only see one place where I wasted coins. Turn 26, I had 6 HP and needed to protect against 12 dmg, so instead of buying a 10 HP heal for 85 coins, I could have purchased a 5 HP heal and two 1 HP heals for 65 coins, saving 20 coins. So, assume the real total here would be 350 coins instead of 370.
Please let me know where else I wasted my coins or used bad strategy. I really need to know because 350 coins to get 20 GP points isn't going to cut it.