Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
My last 2 matches:
still when my own team doesnt play that well you have a good chance to make some kills:
first you buy 3 times the "Heart of Gold". (and don't forget your shoes)
With this item you got Health, Armor and Money, a good start for our Rammus.
Next you start buying the items at this picture:
when no slots are left, sell the Heart of Gold and fill it with the new item.
If it will be a really long game and you already buyed all items, than use the 3 potions to get extra power.
1 - 5:
At the beginning you are weak, don't risk to much.
When the enemy has less hp, you can try to catch him with the Powerball and kill him with the help of the Defensive Ball.
6 - 12:
At mid game your Defensive Ball start getting strong and with your Heart of Gold items you have ordinary hp and armor now. By using the Powerball you can try to surprise the enemies by attacking from behind. With your teammate, your level 6 skill and if necessary with Puncturing Taunt or Ghost you should get some kills, and thx to your Defensive Ball they will not make that much damage.
The only wound point at end game is, when your Defensive Ball is not in use and an AP hero like Ryze, Veigar or co. attacks you. In every other situation the enemies can't make well damage on you but you make high damage per second + well physical damage. When you play intelligent with the help of your teammates, you are really Imba at end game and can be important to win the match.
Normal situation in End Game:
your team and the enemy team in mid, you use the powerball to catch someone with your skill, by using Defensive Ball and Tremors you make well damage and the enemies have problems to kill you with your 3500 hp and the high armor and magic resistance. Your teammates start attacking the enemies from behind.
The enemies have following possibilites 1. attacking me (when all 5 attack they still need some seconds, and normally I have my second life!) and my team can make well damage without resistance. 2. they ignore me and catch the less hp heroes in my team --> I can attack them very well or force them to attack me, sothat the less hp hero can get distance to the fight area 3. the others run away and I can kill the hero I focused on by forcing him to attack me.
It doesn't work everytime, but very often you win the teamfights with Rammus.
When the fight is nearby over you still can try to catch enemies running away with Powerball or additionally your Ghost or at the other hand, you can try to escape with it, when you run away soon enough (after Defensive Ball stopped) and not all 5 are attacking you it will be succesfull
I hope my description is readable, sorry for my english :P