Geb - Rock of Gibraltar

Passive - Hard as Rock Hard as Rock is really a braindead passive, you never need to worry about stacking it or keeping it active, its always just there. It also removes the need for Spectral Armor if you are ever faced with crit builds.
1 - Roll Out Roll Out is Geb's major mobility ability. It can be used as an initiation, chase, or escape. One thing to note about this ability is its unique CC immunity. After 3 seconds Geb is at his top speed and becomes bright gold, letting you know he is CC immune until the ability is finished. Also when you are at top speed, you are able to knockback enemies; however, if you are not at top speed and hit someone with Roll Out they will only take damage have a 30% slow applied to them. This ability has a multitude of uses - you can help teammates by booping someone off of them to help with peel, you can initiate a fight by ganking around an enemy then knocking them into your team or tower, and you can quickly escape a team fight gone wrong.
2 - Shock Wave Shock Wave is Geb's major damage output ability and also applies a knockup. This can be used along side your team member's abilities or a tower by applying CC and keeping them in the damage longer. Keep in mind that the further away you are from an enemy the less damage you are going to do, so snuggle up to them before boppin their noggin. This ability in conjunction with your ultimate is Geb's main combo because it is massive damage, and applies two CC affects.
3 - Stone Shield Stone Shield is the ability that sets apart good players from great players. Its not the fact that when at final build it provides a 650 health shield, but that it can make someone CC immune! When the shield is applied to anyone it will remove the CC from them (It doesn't make them immune for the duration of the shiled, only the instance on which it is applied). You can save your teammates from Da Ji, Ares, Hades, Baron Samedi and countless other god's ultimates with this shield. You're practically another Purification Beads.
4 - Cataclysm Cataclysm is a very unique ability for a guardian, because it does true damage to the target's current health (the more health someone has, the more damage you will do). If Cataclysm is fully upgraded and the enemy has max HP, you will take 35% of their max health immediatly. This ability also applies a 2 second stun. Ive found that this is best used at the beginning of team fights for max effectiveness.