Finding the base:

You want to find a base with most of the resources in the collectors that are outside the village and 2-3 walls to the town hall from the edge of the map.

Phase 1:

Deploy one sneaky goblin for each collector on the edge of the village. Deploy more until every collector is destroyed and goblins want to enter the base.

Phase 2:

Drop 3 haste potions from the edge towards the town hall. Spam wall breakers on the haste potion so they destroy the wall. You can drop one skeleton spell to distract defenses from wall breakers.

Phase 3:

Drop your heroes on the haste and let them enter the village. Drop a jump spell to make the town hall accessible. You can drop the remaining skeleton spells on any infernos or other defenses to distract them. Once the Heroes start taking damage drop 10-20 sneaky goblins so they quickly destroy storages. And then drop 3 sneaky goblins every 2s until you see they start to target the town hall. Once they do, drop 10 at once again. After they destroy the town hall, keep dropping 3 every 2s again.

Where it can go wrong:

In phase 3 if you drop all of them at once they will be all be going from one storage to another and lose invisibility, thats why you drop 3 every 2s.

If there are electric type defenses that can zap many goblins at once, skip these bases.

You wont be gaining trophies like this but a lot of loot.