So I was thinking that having the gravestones is nice, as it offers a small reward for killing a troop, but the reward is often too small. Why is killing a dragon worth as much as killing a barbarian? The solution could be unique gravestones. Each gravestone would look the same, but have the weapon of the troop that died next to it.
Barbarian: Has the barbarian sword leaning against the stone, and gives 20 elixir
Archer: Has the archer bow leaning against the stone, and gives 25 elixir
Goblin: Has the goblin's sack leaning against the stone, and gives 20 elixir
Giant: A brass knuckle leaning against the stone, and gives 500 elixir
Wallbreaker: A bomb sits next to the stone, and gives 200 elixir
Balloon: I don't know, but it would give 500 elixir
Wizard: The wizard's robe would sit nicely folded against the stone, and give 400 elixir
Healer: The stone would have a the same aura as a healing spell around it, and give 1500 elixir
Dragon: The stone would be on fire, and give 15000 elixir
P.E.K.K.A.: The helmet of P.E.K.K.A. would sit next to the stone, and give 20000 elixir
Let me know what you think, and if you have a suggestion for a stone that you think would be better, let me know.

