Blood Debt

Creates a barrier around self that absorbs damage totaling 100% of own maximum HP. If the barrier is not completely absorbed by the end of its duration, the amount remaining is absorbed as damage.

Lv. 50
Cast: Instant
Duration: 10 seconds
Recast: 300 seconds

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To me this ability:
Simplifies the clunkiness of Living Dead.
Maintains its core concept of death if mishandled.
Fits the identity and aesthetic of the job's established abilities (LD/TBN).
Seems to fit safely between other tanks invulns while maintaining independence.
Can be mitigated to some degree with TBN/Souleater/Abyssal Drain (similar to GNB's Superbolide when used in combination with Aurora/Heart of Corundum.)

What do you think?