1)Viscous shield is scaling of max hp and as result we got crazy bugged multiplier.
2) When Redirected force scales the block, the block is not capped at 100%, and thus, when combined with the Interdiction aspect, you end up with an insane block number, which leads to an insane damage multiplier.
Can you fix those two because things got out of control? Spiritborn possesses sufficient damage without any glitches (I am aware of this due to my use of a legit build).