Not Updated For Current Season
I always mainly lvl Defensive ball curl cause this also enables rammus to solo lane by only popping it when the mobs approach your tower and just standing imfront + it gives u great magic res. and armor.
The doran's can be sold later on but its a nice starter item.
I use Flash Clarity
Flashe Because it allows you to flash over those pesky minions that stand inbetween you and the target you want to hit your roll on and Clarity because it allows you to keep popping your roll taunt defensive ball curl combo at the start over and over again totaly annoying your opponent.
The item choises result in a good all round tank with armor magic res and the abbillity to respawn at 40 % hp due to gardian angel + absorb a inc. abbillity due to banshee's all great for your survivalbilty esp. since u'll be rolling into combat first.
Hope this helps alittle sry for the typo's and flame all you want im not claiming this is a perfect build its just my build and i do good with it, hope you will to.