Build Guide by

You may have seen that this build only have three items. That´s because tanks needs to adapt to their enemy´s team. There are three variables that can be done: Armour, Magic Resist and both(You may need to sell your Philosopher´s Sotone for the last item).
The first thing you must buy in any case is the core build (the three items in the build).
Then, if you want armor you must buy a Randuin's Omen , a Thornmail,then a Sunfire Cape and finally another Sunfire Cape or a Guardian Angel(Sunfire if you doing well and Guardian if not so much).
If you want Magic resist, buy a Banshee´s Veil, an Abyssal Scepter, a Force of Nature and a Guardian Angel.
And if their teaam is balanced, buy a Banshee´s Veil, a Sunfire Cape, an Abyssal Scepter and a Guardian Angel.

Early Game
Just farm using tantrum if necesary and try not to do anything crazy(if you find a good opportunity to kill don´t be silly) until you reach level 6.
Mid-Late Game
Don´t be afraid to use your ult, but be smart and do it in the correct moment. For example, if you know that you don´t need it wait until they are running away(if they can) and ult them to stop them. That applies to bandage toss too, because it has a lot of cooldown.