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.
Garen is a great killer and it is nearly impossible to play a game with GAren and not get a few kills at least. Garen has one major weakness though, If he is built as a straight DPS his heath is very low. Just over 2K. This build gives him over 3K health while still keeping a fairly high flat attack damage.
High armor and health to keep you alive longer
Still has good damage
Decent cool down deduction since Garen is very cool down reliant
A little slow
Low Critical chance for a DPS