Many people who are TH11 did all the goblin missions before they were updated months ago. If you go and re-check, many of them have a ton of loot available which can be gotten with a little barch and minions.

I just re-did them all and gained about 2 million elixir in less than half an hour with just barch. Goblin picnic and earlier had loads of little elixir grabs for me.