Get Bossy with Leggo!!! My first guide!
Please turn up your audio, sorry about my soft voice 
A shorter and less annoying way of getting the 5000 named bosses kills, just by slacking in Sinestral Manor! The Achievement will give you 220 points if you complete it! 170 if you don't have Big Game Hunter, see bellow for details.
Achievements completed with the 5000 kills:
*Who's the boss? 10points - Killed 10 named world bosses
*100 bosses 30points-Killed 100 named bosses
* BAM BAM! 40points - Killed 500 named bosses
***Reward : World Leader's Pendant, it increases your proficiency in all gathering by 50***
*1000 named bosses 40points- Killed 1000 named bosses
*5000 named bosses 50points- Killed 5000 named bosses
***Reward Title: Bossy***
*Bountiful Hunter 50points -Completed The achievements bellow:
5000 Bosses
Big Game Hunter - This achievement alone gives 40points but needs another 3 of its own: Killing 1000 bosses, 10000 minions, and 50k monsters, any type . As a level 65 you should already have this one, you usually get it without farming, just by leveling. But if you don't, then go get it! Its very easy and gives a lot of points from lots of smaller achievements connected with it. Also completes one of the effects achievements, taking less damage from bosses with the highest aggro to you. Didn't count this one for the 220 points count because I suppose most of people watching this guide, already have it.
Make sure you alt-tab and kill them every 10minutes or so, i'm not sure until what number they spawn but i think there is a limit of units per terrain, so maybe 100? Also don't leave your character with the back at the teleportal, if the mobs repetitively knock you down and you get near it , they will reset. The area near the teleportal its bugged.
I accidentally killed the boss itself a few times, and had to reset many times to get back in, it gets annoying a bit, but trust me its still much faster and less troublesome than the traditional way.
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