Filed under: Game mechanics, PvP, Opinion, Free-to-play, MOBA, League of Legends, The Summoner's Guidebook League of Legends has had one of the most meteoric ascensions of any current e-sport. From the first tournaments of season one to tomorrow's MLG Summer Arena, LoL has made a bigger splash in the e-sports community than any title launched since StarCraft II. However, the long grind …