Hey this is my 1st time making a build so take it easy on me...

This build is all about armor. no need for attack damage because armor is his damage...

Runes are all about armor and health/regen.

Since all the items are about defense this time it's all about AD

you may refuse to take the cripple and add it to hardened skin

Items... ahh the branch of mastering rammus, since rammus' passive is spiked shell SOME armor will be added into dmg.

I always max out power ball. then max out the DBC. then of course the taunt.

You can always change the skill sequence and max out taunt before the DBC.

It depends on your enemy. If your enemy is a melee type then max out DBC. If the enemy is ranged type then max taunt.

THING TO REMEMBER: when an enemy is on a turret use taunt to make the turret attack them.

...and always, NEVER use DBC when escaping because it lowers your speed

MUST HAVE:
HEAL - since your a tanker you need this to keep harassing enemies or escaping
CLAIRVOYANCE - to keep your powerball refreshed for escaping/harassing enemies (or just kill the golem for the blue buff)
EXHAUST - I KNOW, why use exhaust when you already have powerball... JUST TO CRIPPLE ENEMIES to make an EASY kill

PROS:
-can quickly destroy tower when lvl 6
-Perfect harasser
-Easy killer
-Can harm turrets with his ultimate
-Can defend a wave of minions in less than 1 minute (if you know how)
-Spins while dancing
-Does not speak (so you can calmly play the whole round)

CONS:
-slows when using DBC
-colides with creeps when using powerball (so you can't escape.)
-attacked by turret when an enemy champion steps in with your ultimate
-Does not know how to make a joke...

NEVER harass a crowd of enemies without 1 team beside you and without your ultimate.

ALWAYS use DBC and Tremors when your all alone destroying a turret.