When jungling start wolves first, since Skarner has an amazing clear time it should be no problem at all. Also when your heading to your red to take it the first time you should grab golems first if your smite cool down is above 15 seconds. As Skarner you'll want to start teamfights with your ultimate, and a well placed pull into your whole team can usually kill the enemy before your pull is finished. You should avoid pulling champions like Morgana, Olaf, and Gangplank. Plus if your facing Wukong, Leblanc, or Shaco its imperative you pull the correct one (obvious but I thought I would just say it). Your main focus should be killing an ad carry, as you excel at doing just that. There are many more things I could say, but I won't be able to talk about them all.

Just a quick guide I've been using on Skarner, I main him and I know what I'm doing, so I recommend you try this build out at least once, thank you and good day. I also just want to say this is my first build guide, and to me committing so much to a build like Sir Spankalot's Skarner build is a little unnecessary. I know there's no real organization to it, but I think I covered mostly everything. I hope that with this guide, and a good team to work with, your enemies will feel your sting.