I agree with you that Orcus isn't what people should be focusing on (switch out Orcus for a proper level foe and you still have that problem)
However, the problem I think isn't actually the cloak which _IS_ a strong item but Divine Regeneration (this is the 2nd combo-trick I've seen that hangs on Divine Regeneration).
re: Invulnerability vs Invisibility
That's actually an easy comparison. As you pointed out yourself, the stealthiest of the stealth get crazy good with the invisibility cloak however, the benefit _IS_ tied very strongly to optimization (Maxxed out dex, skill training + skill focus, + racial beanie).
Whereas the invulnerability scarab works irrespective of the build of the character.
Again, this is similar to the problem with blade cascade as others pointed out that if you allow a power to be min-maxxed, the optimizers will break it and trying to nerf if will make it an useless item for the non-optimizers.
Not sure what the solution is....
However, the problem I think isn't actually the cloak which _IS_ a strong item but Divine Regeneration (this is the 2nd combo-trick I've seen that hangs on Divine Regeneration).
re: Invulnerability vs Invisibility
That's actually an easy comparison. As you pointed out yourself, the stealthiest of the stealth get crazy good with the invisibility cloak however, the benefit _IS_ tied very strongly to optimization (Maxxed out dex, skill training + skill focus, + racial beanie).
Whereas the invulnerability scarab works irrespective of the build of the character.
Again, this is similar to the problem with blade cascade as others pointed out that if you allow a power to be min-maxxed, the optimizers will break it and trying to nerf if will make it an useless item for the non-optimizers.
Not sure what the solution is....