Goblins are third units that you will get in the beginning of your Clash of Clans adventure and they perfect for stealing resources. They are extremely fast units, but besides that they are dealing with a huge amount of damage to structures, specially to mines and collectors. The final result is en ligne clash of clans gemmes gratuites that goblins are perfect units for farming.
Goblins are very cheap units, you will need just one supply goes to produce one goblin with production time of 30 seconds for one unit. They can attack only ground units, but they will deal double damage to any resources structure like mines and collectors, because resource structures are their preferred targets. You will also need to upgrade your Barracks to level 3 to produce goblins. The greatest ability of goblins is there above average speed and ability to overrun traps, bombs and even Mortar attacks! That is simply astonishing! If you are looking for farming combination and strategy, do not look any further, goblins perfect units for this role. They will go for the nearest resources structure, mine or collector and attack structure in order to get resources.
That means that goblin will neglect any other structure or units on the field and attack mines and collectors. At the beginning goblins a little bit weak, but after few upgrades they gain additional strength. As we already said, the goblins are completely made for farming and you should use them to collect additional resources like gold, elixir or dark elixir. You will not use them in arrival of battles, because there is no practical and logical explanation for such strategy. Farming with goblins is very easy, you should try to find a base with significant amount of resources. Then, deploy your goblins in several smaller troops and attack resource buildings. One of the major issues with the goblins is the fact that they do not have huge amount of hit points and can be very easily destroyed by splash damage structures like Wizard Towers or Mortars.
You will need to use some kind of protective units to distract initial fire from towers. You can use Giants as perfect tank unit in the game. Another option is to use healing spell that will give more survivability to your goblins. You can also try some other combinations, but primary usage of goblins in this game is for resource farming.