I have elixirs too much. Please tell me useful way of using them?

Upgrade walls with elixer

Walls

YOU CAN USE IT FOR UPGRADING GOLD STORAGES, GOLD MINES AND IN REMOVING OBSTACLES ALSO.

If you have too much elixirs contained in your storages and you have no builders to make use of it for upgrading, then the best way to spend them is to train more troops and donate them to your clan mates’ requests for reinforcement troops.
If you have high level troops then you can also help put troops on clan castles during clan war preparations to make good use of your elixirs.
You can also train for high cost troops like dragons or wizards and use them in attacking so that you can take most of the loot and take much trophies.