So this build rapes for me idk about you guys but its sweet. Btw if u were looking for an extensive guide and a well thought out novel of why I chose this and every little detail...well you'll be sorely disappointed cuz writing is for smartz peepulz.

Choose these runes KK? Because the magic damage you do with Rumbles flamethrower is intense especially when grouped up with his ultimate. Raining down this much fire will definitely get them to focus you but that's where the shield comes into play with that much AP going towards your shield and that much health you are very hard to kill.

Copy this mastery build KK? Probably one of the best builds to stay alive while still being effective with damage. Not much more I can say here just act like a tank and flame on.

Get these items KK? This item build pretty much makes you invincible early game unless you are getting ganked. But once you get most of these items the other team will find out that you're very hard to kill and still have enough AP to dish out mega damage on your foes. Theres no doubt that with the Hextech Gunblade along with the HP from Warmogg's Armor and Ryjal's Crystal Scepter that you can quickly get that health back from flaming and smashing minions after you get done cleaning up the other team.

Get this stuff first KK? Basically you want flamethrower maxed out as soon as possible followed by you're shield because not only is it great for taking more damage but also gives you that nice speed increase that you can spam while chasing down enemies.

Choose these spells cuz they iz gewd KK? Not much to say here if your other abilities didn't quite slow them down enough exhaust should do the trick :D. Then flash to either get that flamethrower kill off or to get out of dodge.

That's my setup if you don't like it then you can S&$% my B@%&$ KK?