Check out also my Season 5 Jungle Rammus gameplay, too bad had my mic muted but ye..

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Hi. My name is InfinityGaming and i play at EUW. I'v been maining Rammus since i started playing. Extremely fun champion and high win/lose ratio.

You can go for movement but i go myself a bit tanky since well rammus has his Q and Boots of Mobility and thats enough speed. But well fullspeed Rammus is so much fun so why wouldn't you try it?

There can be much variations of these and im not saying that these are the best but i really love these!

Always run to your jungle camp with Q and then instantly use your W. If you got blue buff you can also taunt them but doesen't really make big difference so dont do it without blue buff.
Your ult has decently low CD so you can use it last camp before going to base and when you get back to jungle it should be up soon.

Always try to get their ADC/Midlaner of whoever is primary target. You can Q>E>R them and they will be most likely dead. Also your ult is AOE so position yourself well!

PROS

Ultimate does damage on turrets so use it
One of the best CC Junglers
Easy to play
Extremely fun
Will make enemy team frustraded.
So tanky that you will not die easy.
Against full AD team you can build like 5k Health and 400 Armor and they can't do much.

Cons

Early on if you get CC'd hard you're still squishy.
No real escapes if you cant get good way to use your Q
No 1v1 potential

Why would you use anything else?
Or if you wanna try get teleport instead of flash and get one Ap item. Then you can go just destroy enemy objectives with your ult because it does damage on them.

Remember your Ultimate is AOE damage and also deals damage on turrets and so on. So use it for pushing also! Low CD and can be used alot.