This build is mainly used for diving behind enemy lines in a team fight and is great at 1v1's. It is a bit squishier than other shield based builds but does excel at holding down a lane. You still are a tank and have higher health and durability, so don't be afraid to dive for a low health hero if your at a lower health such as 45%. Purge Evil is great in the early game for some damaging poke in lane and does a surprising amount of damage in all stages of the game. Vigorous Strike along with Angelic absorption allows for some great sustainability. You should really try to use minions to get health back out of fights because of the amount of healing you get from Angelic absorption. Some flaws are the higher CD on Righteousness and the lack of Amplified Healing.