This Build let you have the most Health for your gold by the time you get to the amaltas impalar u win. It makes sure you will win the game as fast as possible. This guide is so pro i use garen as my main he is my best. My best build for this toon is what i am about to tell you. Many people say go regular attack damage, but there is a downside to that u wont survive one team fight without the health that is needed to stay alive.

Flash is used to get away from the opponent or to get a quick kill.
Ignite is used to make sure your Demacian Justice does max damage.

Get your judgment first. Decisive strike next. Then judgment, then decisive strike, then judgment, Demacian Justice. after that keep going with judgment and decisive until level 11 then get your second one in Demacian Justice. Then the last one in either decisive or judgment. At level 13 is when you start to level courage. Until level 16 when u get your third Demacian Justice. Then it is courage all the way.
First, use decisive strike to get closer and silence. Next, us judgment to spin and lower there health. Lastly, when there health is low use your ultimate on them to kill them.

I put 21 in the defensive masteries so i can max out his health and I out 9 in the offensive masteries going for just more damage. These focus on his i max out the usually tank masteries, then i put 9 in the offensive part of the masteries focusing on the penetrating of armor not that much cause of all the damage u do is amazing.

Always start with a doran's blade it gives u the only life steal you every need.
It doesn't matter what sequence u get the items in just make sure u get warmongs armor for the health and amalta's impalar for the armor and damage. The madred's blood razors are for the armor and the passive for damage. Last Wisper is an optional items for late game for armor penetration.

My runes focus more on raising his 5 health yellows, 5 attack speed blues ,and 3 health regen quintessence,5 attack damage reds, 4 armor pen reds, 4 health blues, 5 evasion yellows. This maximizes the health regen for his passive. It makes it so your passive heals you a lot. The attack speed is for him to have some sort of attack speed early game and for u to kill them faster.

The items u build work towards your health and your damage output. Force of nature is a good one when facing ability power teams. Most of his items work with his health for the amalta's impalar. The maderds blood razors are for the extra damage it does 4% of champ health on hit so judgment does so much damage. Warmong's armor is for the health you could build two i recommend building two the more health the more attack damage you get from your amalta's impaler.

Working with the teammate in the lane your in the best thing for u as garen cause so they know that u might kill steal from them with the last hit. Garen can also gank at level six to mid while u have ult to get the upper hand on the other opponent. Coordinate with your team mates
when to tank a turret or when not to or you will get yourself killed by the other team. Garen turret dives really easy.

Garens farming is amazing early game your judgment kills the minions so fast that your supposed to level really fast while in a solo lane. Otherwise his farming while with a teammate is just the same as the other champs.

Pro is this build get you a lot of kills.
Con is that your team will call u a kill stealer.

Just build the items above and make sure u have a good team. Make sure that bottom isn't feeding so when u go to gank it is really easy kills. Most likely in ranked you would want the health and amalta's impaler first that is a good choice to go so you have some damage output.

He has a little challenge to his build your abilities have to be consecutive for it to actually do a lot of damage or you will get stuck in a boring game were all u do is decisive strike lowering there health little by little it is boring that way. So you need to use decisive into judgment then if they are already at low health you could end your judgment and use your Demacian Justice to kill them. Demacian Justice hits more damage as they have lower health so make sure they are at low health before you ultimate.

Well i wouldn't recommend jungling with garen cause it will be really hard. If i had to i would start wairths, wolves, golems, and then i would have to base going for madred's razors. After that go blue, wolves, wairths, golems, red, then back working on my boots of swiftness. Then at level 6 gank which ever lane is solo.

This build makes you unstoppable in game. The other team usually surrenders by the time you get your warmongs armor. This build makes anyone who can play garen amazing it is so good. Garen is better as a hybrid ad tank. His ad is so powerful but u dont have the survivability in game. Survivability is the key for him to get a lot of kills.