You could have people playing for gems. Maybe like every day you can play someone for 5 gems or so. What you would do is click a button that matches you up with someone random of your TH level that also clicked the button, and you would attack each other's bases. Whoever get the highest percentage wins the gems. No gold, elixir or dark elixir can be stolen.
also maybe you could pay elixir to play, relative to TH level.

