ALRIGHT ****ERS. I played a **** load of Jugg, now I'm writing a guide. Here is everything you need to know about Jugg.
JUGG IS AN ABSOLUTE ****ING NIGHTMARE TO YOUR ENEMIES. He is the most versatile carry, and he will **** up the enemy team like nobody's business. If you lane with a stunner on your side, you get guaranteed first blood with your Blade Fury. If you lane mid, you become the god of ganking. If you meet an enemy hero in the jungle, it's a guaranteed kill. As a carry, getting a Godlike is a piece of cake. As long as you don't play like a dumbass, your enemies will FEAR YOU LIKE GOD. You have the best skills in the game, be smart and use them well.
You need enough mana for a Blade Fury + Omni-GG-Slash combo at level 6. So level up Stats in the beginning.
Healing Ward won't be used in early game (there won't be much team fights), but you can replace a stat for this skill if you are getting harassed.
STARTING: Get a Tango and a Healing Salve for regen. Now choose between a Quelling Blade or Stout Shield (choose Stout Shield if you're laning against a ranged hero). Finally, pick up 3 GG-Branches for stats.
EARLY: Get Boots of Speed first. Then, start building your Battle Fury. Battle Fury will allow you to farm like a boos due to its cleave ability. Get Perservearance first, then the two swords. You should have completed Battle Fury before 20 minutes into the game. Last hit and gank like nobody's business to get Battle Fury ASAP. When you get it, go to jungle and FARM FARM FARM.
MID-GAME: Now you can build phase boots. Phase boots makes you chase an enemy/escape much more easily. You can also use phase boots while spinning. (Phase after spinning, NOT spin after Phase).
LATE-GAME: Then build in order: Desolator -> Manta Style -> Butterfly. This makes right clicking feel like you're fingering a girl, and every click she has an ******.
For increased fun (ONLY FOR PUB STOMPING /DON'T GET THIS FOR SERIOUS PLAYING), get Aghanim's Scepter. This increases slashes to 12, and decreases cooldown. You will be the God of Rape.
Last hit like a **********er, then get loads of kills, then rape the enemy team. You are an unstoppable force, and your enemies will run away like babies. Chase them, and rape them. JUGS FOREVER.