Ok, Sion is one of the champs that has been seen on the ProfesSIONal(kappa) scene and in the soloQ, he can be build as a bruiser but in any case he is more of a carr if you can build him full tank because of the damage it can deal and because of the resistance you´ll have it will be always a bad idea to focus you, and if they do your team will have an open door to deal tons of damage, also you´ll revive and still deal lots of damage. I know that this is very basic but it is not a champ that needs a challenger level of skill, you can get a ton of wins with him and a lot of fun, but one last thing, PRACTICE THAT ******** ULT.