If you're willing to tank a notorious monster in a fate, and you're not in a party, then don't get mad if no one heals you. Remember, these are people that have no connection to you, they could careless and honestly, they're not required to heal or revive you. If you want to tank in fates, and expect heals, then join a party. I see no reason as to why a healer should sacrifice rewards to heal or revive someone. It's nice when they do, but NEVER expect it.