How to properly play Visage mid

I'd like to object to getting medallion after Agh's, Medalion is a must and should come before Agh's since it increases you damage output so much as well as giving you the mana you need to cast your high mana spells. A little bit more formatting and a section on gameplay/tips and tricks/etc. would make this guide pretty good. Holding on to my +1 for now, I'll check back in later.