Originally Posted by Rifick
I hate having to say this, but I would advise going wriggles first on all champions that can take it
I play skarner quite a bit, hes become one of my favourite champions, I would really suggest Wriggles lantern, you have NO idea how useful it is to have double lantern in your team and sneak dragon before the enemy can even react. Second, I think Trinity Force is his most important item, so keep getting that. Wits end is also great, I usually get it after sheen. While starks is not bad, I believe there are better items out there. Gunblade comes to mind. Atmogs is also great on him, so is Guardian Angel. I dont really like reverie much because in my honest opinion you are already fast enough with just trinity and exoskeleton.
I have never built him AP but Im sure hybridish AP builds would work on him great (Deathcap/Lichbane/Zhonyas/AScepter/Ionian/Nashors comes to mind).