The undying one. Get your stacks, keep your 4 running, make use of your 2 and some weapon synergies like [Redeemer Prime]

Why no max Rank [Adaptation]?
Rank 10 gives max DMG reduction, further Ranks increase buff Duration. Not worth the additional drain!

WARNING:
As always Aracanes only enhance the build, they are not needed to play it ;)
Same goes for Exilus, Enhances gameplay but not needed.