Originally Posted by Minrog
Sion and Rammus both have 1 hard CC available to them. They both have the ability to absorb extra damage and they both have a native bonus to their raw attack damage. The only difference between these two is that Sion has a super AOE heal spell during team fights and Rammus has powerball.
If you call Rammus a tank, Sion should be listed there too.
Personally I stil don't see Sion as a Tank. I've played him, quite extensively. I feel he's more of a bruiser than he is a Tank. And in the end, from my experiences, when put side to side in a team fight, Amumu and Rammus take the lead in terms of 'Tank' rather than Sion. Every ability he has is more focused towards sustained damage, rather than ensuring that team fights swing YOUR way.
He has a single target Stun, yes, good, great. It might have a quick recharge but in a team fight, fight could be well and done with by the time you get the second, or even third stun off. And by then you've only stunned two separate people, and by the time the second stun goes out, the first ******* you stunned is out of it and back in action.
He has a shield, great. But it only blows up and deals damage when A) you trigger it, or B) it reaches it's 10 second mark. But guess what? 2 good quick whacks from ANYTHING skill related from just about any champion means the shield dies and no damage goes out. All in all I feel his shield is more damage focused than Tank focused, given the general strategy I've seen is to bush, cast shield, wait for a good time, then run in and pop it. Which basically makes the shield useless, as a shield.
And lastly he has a Team Heal. Great, but that doesn't save his ass if he gets focused. Sure it enables him and his team mates to last longer, possibly long enough to tear down any enemy carries foolish enough to still be around, but in the end it's more of a means of sustaining himself, so that he does more damage.
Hopefully you see where I'm getting with this.