Well, you probably want to play him, and get him down fast, and then you have to protect him. As NBarden said, it's not a very good strategy, but it might be worth a shot for fun at least, so I'd advise playing monogreen with acceleration. Pack 4 of each Birds of Paradise, Llanowar Elves, Search for Tomorrow, Wall of Roots, Fertile Ground, Garruk Wildspeaker, etc. Then, you need to FIND the Trolls, so aside from playing 4 of them, I'd pack Harmonize and Primal Command. For defending purposes, I'd pack Avoid Fate. Last, for packing a punch with OTHER stuff besides the Troll, I'd play Tarmogoyf, Chameleon Colossus, Troll Ascetic and Loxodon Warhammer.