Reviewing
Mesem
* Con bonus missing on Base statistics (was correctly added to Combat stat HP and saves). Fixed.
* Added note that Ancestral Arms replaces Adaptability in racial traits.
* I see that it's pretty redundant to have a separate melee and ranged line for the dagger when the end results are the same, but I added "/Dex" to the attack calculation to cover both attack types just to cover bases.
* I would note the conditional save bonus vs. enchantments in the combat block, but that's just a preference of mine. I tend to forget conditional bonuses if they aren't right next to the regular roll stats.
* Flat-footed AC listed wrong in Eidolon template. Fixed.
(side note / question for judges, I guess: given how complicated a synthesist sheet is anyway, is there a reason we need to keep that template? I think the only thing I see on there that's not listed above is the evolutions, which could pretty easily be added as a line item instead of that big block with a lot of duplicate info)
* Your background says that Mesem's brother is the one with the last name Adrarda, and Mesem's is an undisclosed name for 'bound with Wrath.' I'm assuming you want to invert that, unless you're looking to rename?
Since the only thing there is a fluff issue,
APPROVED. That's your second.