The Ronin Who Cannot Die

5 Ronin: Wolverine

Wolverine's Claws can be used to pay for In Harm's Way, producing now both ATK and THW and giving the attack piercing.

Additional healing through Med Team, Night Nurse, Preservation, and What Doesn't Kill Me; which is also a ready to complement Army of One.

X-Gene and Deft Focus are for Regenerative Healing and Track by Scent with some built-in redundancy for getting something into play to free up cards-in-hand.

In multiplayer, I would go to 45 cards adding "I Can Do This All Day" to defend for other heroes without exhausting