Well, Skarner is a new champion many of you dont know him but he is actually a great jungler, in my opinion he is a good hero. His ultimate is a good ganking tool in lanes. Dont talk **** to this guide its my first guide, so be nice :) Maybe it is short but i need to get better known with Skarner too.

Pros
Build strong with health
Good laning control early/mid game
"Heal" with Fracture

Cons
Not good ganking until lvl 6
Q ability based on Attack Damage not Ability Power
Ultimate maybe to short

Since I start with the Sapphire Crystal it means that you can solo and dont need the golem buff first. Since i get the Ability Power Glyphs first you get 8.99 ability power, then your "E" ability actually takes some damage. Continiue with cloth armor and Catalyst The Protector. Build your Cloth Armor first into Madreds Razor cause of the passive then into Wriggels Lantern and your Catalyst The Protector into a Rod of Ages. After that you can just follow actually what you want either you for the Rylai's Crystal Scepter for the bonus health or Rabadons Deathcap or just the Void Staff if the other team is more MR'isty.

You start up with the Wraiths, Smite the big wraith since it does the damage then simply use Fracture and make sure to attack all three to get most possible health back.
Advance to the wolf camp, take them down with Fracture and basic attacks, then u lvl up and upgrade Crystal Slash. Go back and get your Cloth Armor and walk to the golem buff. Then spam your Crystal Slash thanks to your Passive, and same with Fracture until you can use Smite. Go to the Wraiths again before Golems, Then lizard buff. Continiue until lvl 6 and gank as much as you can! Good Luck!

Please comment whats good or bad! This is my first build but it has gone good for me with this tactic. As i surely has written some times this is my FIRST build, so be nice i cant so much of writing but i gotta start somewhere. So if anything is good with the build, how i wrote this or if it worked, COMMENT :)
See Ya!