Originally Posted by
Skivvy
The goal of a farm party is to clear the fight as quickly as possible, get loot, then start the fight immediately after.
An example would be people farming Ravana for the bird mount. If they can successfully clear the fight in 5 minutes* each time, they can squeeze in quite a few runs before people need to leave. If you are wiping half the time, you are losing out on potential drops. So this is why people want to put together competent groups who can repeatedly clear a fight with little to no issue.
*Pulled a random time out my arse as I do not farm Ravana.