Alright, so as per requested I'm here for another decision. Back to back so it seems.
*cracks knuckles*
Well I usually just make these decisions as I'm typing now right this very second, which is why they tend to be lengthy; since as a judge, I would have reviewed both sides and your 'statements' as to why you'd believe your actions are justified. Basic things to help this fight balance out with all the timeouts and commercial breaks. And without a jury I like to explain the reasoning of my decision as I go along.
Also for the last time, I can do my own research and read the wikia, no need to copy and paste as if this were an actual trial. I review the matches from the fight posts themselves and apply 'Naruto logic' from then on. Its a wikipedia not a how to win a biju match study book. So after hearing both sides, I'll leave it at this:
Typically in fights you should be nit picky with how you read and interpret your opponents responses; but in another sense the information you gather and use to plot against said opponent may be borderline meta-gaming and even to an extent, with this case, retro posting. It should be common sense that if something was brought into the battle field, that unless interrupted, it would remain at play.
i.e. Multiple hiraishin marked kunai were launched at an opponent, yet he evaded them. Unless somewhere down the line of the fight those kunai were tampered with, it is fair game to still utilize them if forgotten.So in this case, it would simply come down to neglect in regards to assuming Kaze deactivated his lightning release; which would have allowed Synth's attack to gain an edge on him.
Although, there were other disputes with the post. Prior to engagement in combat, both characters didn't even do as much as a Seal of Confrontation than even look at each other. As I say this, being a Byakugan user myself, when one spies through said eyes it is not direct contact that the Byakugan is displaying. It isn't as if the person being stalked by a Byakugan feels eyes on them. So for another assumption to be made that simply because one was looking through their Byakugan at them, such material is plausible for an eye-locking or gesture-locking genjutsu to fall into place wouldn't go by me. I like to provide examples though so here's another one.
i.e. A Byakugan user was stalking a fight in the near distance and getting up close and personal. Within the fight a flashbomb was set off which then blinded both fighters. Unless they are physically present and engaged, the Byakugan wouldn't be affected as much as simply noticing the flash bomb go off; not receiving its stunning effects.In this instance, there would need to be a physical interaction like eye contact for the Ephemeral to have been executed as Synth expected. Regardless the Byakugan should still be able to disfigure and tell when the genjutsu was beginning to activate.
Lastly, my own personal review of the post was to note that the ending seemed a bit like an auto-hit. Almost securing the 'fact' that Kaze wouldn't have enough time to react to Synth's assault due to lack of lightning release armor(which he has) and locking in a gestured based genjutsu without an actual gesture made towards said trigger. With such said, Kaze should still be able to respond and defend himself properly; altering the expected outcome of Synthesis's response. It also dips into retro posting, having made the gesture before hand without clarifying that it was to initiate a genjutsu. Especially since its bad taste to attack on first post as well. One last example because you guys got me riled up for this decision.
i.e.The most classic example would be when throwing a basic kunai or shuriken and having the opponent believe they are some expert and catch the thrown projectile to be used back 'atcha. Only in the next post would it be revealed that it was an explosive tagged projectile. Of course without any previous mention the opponent wouldn't have known and had they, they probably wouldn't touch the projectile.At this point I would request a repost for fair play and to see if there is more to this fight than just calling myself in for a decision. Unless of course, Genesis/Synthesis feels as if a repost is not needed than he and I should be okay to let this lead into the next events at play; which is the failure to defend against the previous assault done by Kaze. Given the post was more assault without a pinch of defense, as well as the ass-u-m'e'-ptions made and their false bearings this would leave Synthesis exposed for Kaze's assault to be a success and in the next post 'hit' as one would properly do. Since attacking and sealing the deal in one post usually never was allowed, nor happened. This is SL after all.
As per the repost, now I don't want an epiphany to happen to your character for him to 'learn from his mistakes' and do everything the opposite of what was just posted. But if in a way you can reorganize your actions and fit them accordingly for a proper post then it is acceptable. Meaning Synthesis still tries Ephemeral and such, only; if you'd like you have a slap on the wrist and a chance to prove your worth, not just slander a prior post as if it were a debate and not a fight. Otherwise the scene would lead with Kaze's advantage and I'm fine with either outcome, it isn't my match.
TL;DR Either repost to enhance Ephemeral technique or take the L
P.S. I had my own trial today for my college due to a mishap so I'm just in this judicial, orderly mode today. On top of having driven miles and such with no sleep. This post was also delayed a couple days back so I had to make sure I didn't miss out on any factors regarding my decision and posted it immediately because it is of course the nine tails. Duh. Anyways this is TMI but y'all wanted my opinion so ya got it.