righto!!! well this is my first guide so it'll probably get about 12% approval and be massively hated but MEH!!

welcome to rumble!a tanky mage chaser....thing
right well i've seen far too many tank built rumble's and i've never thought it a good idea to build him as such, his skills scale far too well into devastating abilities, his chasing is great and he's not overly tanky, thusly AP rumble became born!

with this build i get very positive scores and more than a few multi kills

right in terms of runes, there are undoubtably better ones but this combo gives me nice survivability from the armour,magic resist and health but also helps DPS with the magi pen

masteries built around giving magic even more penetration but balances his overly weak nature with some nice boosts from the defense tree

right now the reason for my build

i start with early morello's, this gives a very nice boost to AP with some awesome cooldown reduction (thats gonna make chasing muuuuuuuch easier) the MP5 is wasted but ya can't have everything from one item :D you can go for a majaeis but personally i don't like snowball items even if i am doing well

the boots are simple, more CDR, gets his skills off even quicker

ryalai's scepter for the nice ealth boost, good AP and the BEAUTIFUL slow, combined with rumble's 2 slows already its just lovely

rabbadons is simple, boost your AP up the bum and out the roof.

lastly zhonya's, completely honestly i've never had a game go on long enough for me to get this but it'll round out quite nicely.

basically i like to max the harpoons as quickly as possible with some early points in flame spitters and shield for the speed boost. the harpoons do a very nice amount of damage and the stacking slow is brilliant for chasing and escaping

personally i like to go with ghost and exhaust but thats a personal opinion, flasha nd ignite would also be viable.

well thats about it for my rumble build, just the basics really, you decide for ya self how to play, personally i like to harass with harpoons and then power in, use ulti to block of lanes or land in for devastiting effect in team fights/ potential ganks. my favourite use of it was being ganked by a fed trynde and karthus and managing to get a double kill. the ulti does stupidly good damage and is hella fun to use :D good hunting rumblenauts!