I brought this build together for one reason and one reason o9nly. I'm bored with playing Garen only as a tank. Everytime I pick him thats what people expect. This build should help spread the idea that Garen can just as easily crush champions brutally beneath his boot as he can survive an onslaught of enemy champions. Hes a versatile and strong champion who can fill both rolls if he wants. I choose flash as a summoner spell because its usefull in both chasing and escaping. Ignite is there to aid in ticking down more health before demacian justice or to finish the job if you miscalculate. His masteries are offensive to give the most bang for his buck and he has a garunteed crit chance if you figure them in. Also If you check The runes youll noticed I capatalized on that crit chance by raising the cap on the crit damage as much as possible.
As always this build will not work for everyone but maybe it will give you some ideas to incorporate in your play style. Good luck and have fun summoners.