Hello!
I offer next cost sytem (for ranking cards):
Basis:
Card (tech0) = 4 points (pts)
Card (tech1 or spec spell) = 10 pts
Card (tech2) = 16 pts
1 Gold = 3 pts
1 Gold (spending for tech2) = 4 pts
Units:
1 HP = 2 pts
1 Attack = 3 pts:
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sparkshot = 1 pts
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resist X = X pts
-
anti-air = 0.5 pts per Attack (as Attack x 7/6)
-
frenzy = 2 pts
-
overpower = 1 pts per Attack except the first (as Attack x 4/3 - 1)
-
readiness = 1 pts per Attack (as Attack x 4/3)
-
haste = 1.5 pts per Attack (as Attack x 1.5)
-
stealth = 1.5 per Attack (as Attack x 1.5)
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swift strike = 2 pts per Attack (as Attack x 5/3)
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unblockable = 2 pts per Attack (as Attack x 5/3)
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ranged = 2 pts per Attack (as Attack x 5/3)
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flying = 3 pts per Attack (as Attack x 2)
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can’t attack = -1.5 pts per Attack (as Attack / 2)
-
can’t patrol = -1 pts per HP (as HP / 2)
Some effects:
Card draw/discard = 7 pts
1 damage to patrol = 4 pts
1 damage to unit = 5 pts
1 damage to base = 4 pts (your base = 2 pts)
1 damage to building = 5 pts