You're gonna wanna start at golems, hit them both with your Q then smite one and kill it first make sure to use your first potion. Go to wraiths and make sure you hit the big one with Q and kill it first, second potion whenever here. Kill wolves big one first and you can probably get them all with your Q if you shoot early but you lose time attacking with AD boost. Smite blue golem and Q it once you're about to get your first hit with passive bonus, keep potion up, this is your third. Feel free to use Q to get to small golems at this point you should be racing the respawn timer and hit your 4 potion as you're passing red buff. To kill the golems just spam abilities and make good use of time attacking with duskbringer, I try to time my passive with it by waiting an extra attack if it isnt procced. Go to red and make sure you've used your fifth health potion, your smite will be up so use it and spam abilities, if you find you get low here, don't kill the small lizards with your Q let your passive heal off of them and and they will die that way. (They still die before lizard does and there damage is irrelevant compared to big lizard.) Go to wraiths and kill the big one first, then make use of your red buff by hitting and 3 smalls one after the other to get the red buff DoT to full use. Go kill the small wolves, I know you only have like 100 health left right? Don't be a *****, you'll steal enough health on your first hit to be fine AND you have double buff.(Fear the big wolf, geez that was close.) At this point you can what ever you want really, boots and any item even like a dorans blade or something if you wait in spawn pool for like 10 seconds. Go to the jungle again, and kill your golems I like to smite the big one for money and to get it on CD but it could be better to save it for dragon at this point or counter jungling. Get the wraiths, same deal big one first. Then get your wolves. All of a sudden you're level 6 and your jungle has been cleared. have fun ganking with your dorans blade I just got you.

Pro Tip: jungling without flash is stupid if you know that the other team has any brains because they will counter you and you won't get to level 6 in time to make up for you being countered.
This jungle leaves you really low health at the end, if you get CV'ed even once and they see that you're rushing level 6, you might have to get help from your team.

Because you probably plan on still jungling, get madreds and build it into bloodrazor or wriggles. Aside from that build reactively if you wanna be tanky and try to use your skills to promote your team getting kills, not just you, that's right I said be a support nocturne. Because the point of rushing level 6 is to make a game changing paranoia play at like the 7 minute mark.

Items I suggest:
Madreds bloodrazor or wriggles lantern
mercury treads or berserker greaves
banshee's veil
frozen heart
brutalizer or infinity edge or bloodthirster
warmogs/atmas

The reason I suggest berserker greaves is because it's cheap AS and if you're gonna build a banshee's veil, you should be able to get by with that and your W.