My whole thoughts with this.
Saike needs healed or he will die. The healing god can only heal once more or he will die.
However Saike can reverse the day probably not being only in Mogura or a holy lake, but having the courage to die to reset. It's likely that drowning isn't even the key to him resetting, simply the way he's always done it up until now. I mean how can you even tell if you haven't died in other ways.
At any rate the point is that when he reset this latest time his health got considerably worse. In other words, his health is acting in a straight timeline DESPITE the reset. So literally the biggest loophole right now is that the Healing God could heal Saike and die. Saike reset. And then Saike and the Healing God both be ok.
My evidence?
I understand that Saike claimed that his health would reset to that point in time in the same day, but it really doesn't make any sense, the entire time he's been back his condition has been worse - sweating and this time collapsing worse than before. He can't even say for sure if his health really would reset to the same point in time, again his oracle again seems to affect his body in a straight timeline despite the resets. Maybe a better way to state it is that oracle's effects aren't affected by the resetting timeline when applied to Saike. So the healing oracle might just be a boon that sticks regardless of a reset.
So when was a time that Saike WAS affected by an oracle? But reset?
Oh right. When he was brainwashed by Johanne.
And didn't he go back in time to when he was supposed to be brainwashed? That's right he did.
But despite resetting back to a condition where he was supposed to be under their hypnosis oracle his memory was unaffected when returning to that point in time.
So this means that either
A) I just found a plothole
B) Oracles on Saike remain on Saike regardless of resets
Boom.