Sion advice needed
I was watching Dyrus play Sion and learning to improve myself. I noticed his leveling order is R>E>W>Q. I've always done R>Q>W>E. Am i building wrong or is this leveling order specific to this match up? His team is Sion, Gragas, Janna, Corki, Kassadin. Enemey team was RIven, Fiddlesticks, Kog maw, Leblanc, and Thresh. Like I said in title, can someone give me some advice on what's happening here?