For the Greater Good

SUMMARY: AU post 5th year and after Sirius' death. Harry lets out his inner Slytherin to level the playing field and gathers heretofore unknown allies and friends into an army. Not against Voldie but against Dumbledore. Lots of Light side bashing. More smart and politically savvy Grey Harry. Grey Neville. Grey Faction alliance. Goblins Allies and deviously clever elves.