was looking at the talent tree for the paragon the other day and thought kind of the same thing to myself about the dual wield tanking.
played around with the calculator a little and came up with... http://rift.zam.com/en/stc.html?t=0cuhA.xxtco0z.VhMh.V0qth0oVfo
gaining threat from reaver, getting some damage reduction from reaver, gaining what seems to be a lot of parry from paragon. also getting a strength buff from paragon and an endurance buff from paladin as well as a full heal from paladin.
im probablly missing something vital, so if anyone has feedback feel free to inform me.