LIFESTEALER - ALT+TAB'ing your way through the JUNGLE

bkb - people say he doesn't need it - that's Bullsh.. Rage + bkb + rage again (a couple of seconds of CD when you have used the bkb a few times) but that's basically magic immune for the entire clash. people like rhasta, lion, lina, ogre magi supports, will not be happy!
Attack speed build is best in my opinion as well.
Also get a midas always! AS + the active..
Don't forget to stack the neutrals (especially the large camp) when you hit 6, you could hit a large creep, infest the other large creep, burst out, and repeat process until you can tank them successfully.. just stick to the mid to low camps while you are stacking.

Do you rather go for the Mjollr before my late game items? Or would you consider to buy it right after those? And help me to understand why. ;) Thanks.

The CDR is also useful, but this is my play style :D not saying it's better.

a satanic is a big no no and mjollr should be in core

Open Wounds provides the same amount of slow at level 1-4. The increased life % isn't good early game since everyone has a low damage and low health pool to take advantage of it. Maxing out Rage over it is superior since the increased timer of attack speed and magic immunity makes you more survivable.

I'd max Open Wounds before Rage, it's more useful for you and your team. Gives a massive slow and lifesteal for everyone.