if you can solo mid its the best
Start with Rejuvenation bead and 3 pot of mana and heal
this way you can arrast the ennemis a lot with phosporus bomb and valkyrie and if your good you can get first blood under 3 min
buy ruby and saphyr crystal to upgrade them in catalyst.
after that its up to you if you want to get black cleaver first or last whisper
the rejuvenation bead can be convert into a emblem of valor and later into a stark's fervor