The increased blocked dmg from str is maybe 1% if you fully spec it to that. The maybe being if you break the tier... if you do not it is literally no difference.

The increase to hp is around 8-10% from Vit.

The enmity increase increase from dmg is more or less negligible when you factor in you will be using shield oath 100% of the time while tanking. Considering the reduced dmg you deal when it is up.

As for dex, I seen no evidence in a substantial increase to block that would beat out the 10% hp gain.

I cannot understand why anyone would choose anything but full VIT with the way the stats are currently working.