This is the only chance you are going to survive against the weak (not really weak....) and medium titans.It can be crafted by using Harcadium and gives you some insane buffs. [WARNING:Dont try to fight the stronger titans with this armour, you can die!!!]
This is another armour that makes you capable of not dying against the titans and also gives you some insane buffs, but unlike the Harcadium armour, this armour kills almost every normal mob around you in a small radius very quickly. So it can be used to kill the minions while you take on the titan itself. Available in the end, nowhere, and very rarely the overworld.
This is the strongest armour in the entire mod. It gives you insane buffs and explodes the ground near you in a small radius when you jump and land on the ground.