Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Just a nice easy balanced Galio build. Obviously tailored to a game with 2 "AP" classes and 2 Melee classes with 1 support or tank class. I wont bore you with details that you can find above, but you modify this to go further towards a melee team build, or vice versa to a full on AP team build, I would make the following changes:
"AP" team (Team consisting of 3 or more Ability Point Hero's)- Chalice, Mercury Treads, Banshee's Veil, Gaurdian Angel, Aegis of the Legion, Force of Nature
"Melee" team (Team consisting of 3 or more Physical Attack Hero's) - Chalice, Ninja Tabi, Gaurdian Angel, Aegis of the Legion, Sunfire Cloak, Randuin's Omen / Frozen Mallet