Hello , This is my second build and im not even level 30 but i can guarantee this is a good build. Those who didn't like playing with Rumble before try this build and then tell me something ^^ .

Rumble is a greath character.

I play rumble as a mage/tank.

Well, basicly since im not lvl 30 i'm not really concerned on the runes but if i was to use runes i would use the ones i assigned.

Ok, so the items are for Ap (Abilite Power) and Defense (armor e magic resist) items

You will start with Doran's shield for i little health boost some armor and health recovery.

Next mercury's treads because the reduces 35% the duration of stuns, slows, taunts, fears, snares, sleeps, and immobilizes, and that is very useful to run when things aren't looking right.

Rylai's Crystal Scepter to add some slow to your spells,and more hp and ap which is always good.

Force of nature and Sunfire cape marks the begin in your tank part of the build, first buy what suits you best according to the opposing team.

For the end a couple of Rabadon's Deathcap to really add tons of AP and crush the opposing team.

P.s. Don't forget to sell the Doran's shield, and score some kills ^^ .

Well Rumble is great at Mage/Tank but still like every champion they have pros and cons.

Pros:
-Ap + Rabadon's Deathcap = damage like hell :D .
-The Equalizer is something you may use to help you team and score some kills/assists.
-Flamespitter just kills everything in his path its an awesome skill.
-Rumble does loads of damage and have a moderate life.

Cons:
-The Equalizer isn't the easiest skill to use, in a critical situation and you need the ultimate you may die.
-I don't know for now more cons if you know comment plz.

So in Team work you can teleport to help your friends or to return fast to your lane.
Simply keep your range and use your Electro-Harpoon to slow your enemies and with the help of your team members your score a kill.

I like Flash to run from some tight situations.
Teleport is to help your friends or to return fast to your lane, if you don't like teleport you can use ignite.

The masteries i Inputed are the one i think are the best for Mage/Tank,some def and some magic pen.

Well i strongly recommend that you max out first your Q (Flamespitter) because it will be the main source of damage, next up W (scarp shield) to max except at lv. 4 than you put one on E (Electro-Harpoon) for some slows, and lv up your ult whenever you can xD .

Rumble is a great character, easy and fun to play.

Tips: Don't go tower diving until lv 9-11
Don't run if the opponent the same life as you you deal tones of damage with just E-»Q .
Use Electro-Harpoon to check bushes don't risk you life, and in extreme cases when you suspect a whole team is in the busk use The Equalizer (and better spend an ultimate, to die and feed the opposing team).

I hope you like the build so rate and leave a comment ^^ .