Okay, let's do another possible run through of last nights events, assuming 1) Zaealix is town, 2) Byzantine is survivor and has been honest, and 4) I am not lying about putting my heal on Nictis. (Yes, I am aware that from your perspective I could be scum and lying. I will consider that possibility in yet another post, which will probably be tomorrow or during the next day phase.
For the reasons I stated last time, Zaealix must have been switched with Scum1 by someone on Scumteam2, which Scum1 does not belong to. Scum1 would then have been healed, either by someone on their scumteam or by town who thinks that Scum1 is not scum. Since I am not scum, and we already have two switches, whoever healed me must have targeted me, therefore Tykan didn't heal me. So the heal that landed on Zaealix must have been Tykan's.
So the only remaining possibility is that Scum1 is either Tykan or Tykan's teammate, who was healed by Tykan but Scumteam2 switched Scum1 with Zaealix. We can actually probably further narrow it down, because Tykan was so plainly going to be the lynch today that I don't think his scumteam would have wanted to waste the heal on him. So in this hypothetical Tykan healed his teammate, which is almost certainly Mesonoxian, but Scumteam2 switched Zaealix and Mesonoxian.
But this doesn't really make any sense either. What reason would Scumteam2 have for switching Zaealix and Mesonoxian? The primary use of a Coin here would be to ensure protection or detection measures were not implied to whoever their intended target was. But BOTH Zaealix and Mesonoxian would be prime targets for defensive measures, Zaealix by any town staffholder or by any town watcher, and Meso by his teammate Tykan. The Tykan/Meso team (according to Tykan, Fiends) was pretty clearly out at EoD yesterday, so Scumteam2 would have known this.