Ranking the Goblin campaign elixir ratio

The Goblin campaign is kinda boring (IMO) and seems to take more elixir than the reward...

However, if the notion is to teach an attack strategy, why not rank those who've completed each camp/battle by the LEAST amount of elixir it took to beat each goblin camp?

For instance, Player A used 1500 elixir to beat the scenario, and Player B used 1250, so Player B is ranked higher. Could be ranked globally AS WELL as within your own CLAN.

I'd love to promote a little in-clan competition, seeing who can beat which campaign the 'cheapest'. Top five or ten perhaps?

Something to do whilst a shield is up...