Since when is Skarner a juggernaut?
Sure you could go full tank on him...
You can go full tank on anyone. Point is after the last rework he was compared to Jax in terms of dueling potential as a fighter. A BRUISER. If I wanted to have a terrible clear going full tank I'll jungle cinder hulk shaco. Probably would still be more useful.
I'm going to try to get a few games as Skarner in now before the legless no dmg slug your turning him into is released. After that I'm probably going to try to get his Battlecast skin refunded as I don't see myself playing him in his pbe state ever again without serious revision.