-The Goblins, Minthara, Dror Razglin etc...have an active army that has dominated the countryside and is searching for the Druid grove to destroy them.
-The Goblin Camp are all trained fighters unified and organized into Warbands. (There is some internal competition but its not an issue)
-The Goblins have accumulated a lot of treasure from the raids they have been carrying out. They have food, money, and magic.
-The Goblins have clear leadership (again with some internal competition, but they are all firmly on the same side and not trying to destroy each other)
-The Goblins have strong allies supplying them(Zhentarim).
The Zhents are not their allies; they just do business with them, and they will do business with you as well. The goblins can be hardly called an army; there are a large group at best, but considering the druids are not exactly a military force defeating is not much of a feat. The don't even control much of this countryside, just the ruins and the nearby village. Any larger military force would likely cut them down with ease, which might be the reason Minthara is so impatient.
Allying with the goblins gets you no real rewards, you just do the job that Minthara has been failing at for the dubious pleasure of her acting like she's your boss. If you value strength, both factions are weak, if you are motivated by greed, you can destroy both factions for their treasures, if you are motivated by the promise of tadpole powers, Daisy gives you that regardless of your alliances.
