Here's a few options:
1) One way to fix this is careful observation of elixir available in your raids. If you wish to use Mass Dragons, you need to use it on high elixir bases. Not necessarily breaking even, but a high amount of elixir. Yes, there will be a significant increase in searching time with this option, but it's almost a necessary evil when using the Mass Dragons strategy.
2) Switch to Balloonion and go for 50% (and occasionally the 2 star) raids. This is a significant drop in army cost (yes, level 5 loons will work but you need to be very, very precise). Still, you must monitor your elixir intake on raids closely.
3) My clan mate who was just in Champs was talking about his strategy for keeping elixir high, which is for every long push of just trophy focus, he would take a couple raids and go for the win, but prioritize the elixir intake as well (resulting in a higher search time for elixir-prioritized raids, but still able to gain some trophies and keep elixir intake high.
Hope this helps you.
