Think of it like this though, Even with IB being available, we will need to use it more often then just a mini Rampart, or else we are effectivly not mitigating damage as well as Paladins. Rampart lasts for 20 seconds, IB for 6. So basically Rampart will always out perform is were going to judge tanks on Mitigation per second. This basically allows us to use IB Pre-Emptivly, instead of Post, which is WAY safer than watching our HP drop to 5% and praying for a fast heal to supplement the IB. Since Vengeance now acts as a Sentinel as well, we can use that instead as our incoming Damage deflection. Then we finally have a literal emergency button that will do something with Holmgang. As it stands now, Warriors have no such "Oh Sh**" button, and as such, we can't be considered as reliable as paladins. (Math not even being brought into the equation which clearly shows paladins ahead currently)