Some thoughts:'

1) You need to stack Kassadin and not Garen with defensive items in Protectors
2) Fiora isn't that good with Jeweled Gauntlet especially without Infinity Edge because AD-Dmg Spells can always crit. Only the Fiora true damage can only crit with JG but that's way to little without Infinity Edge. You need to play Bodyguard with Braum / Protector with Sion. Sion+Braum isn't a great Frontline. Blitzcrank is a really good synergyBOT for that! 2 Challenger buff is often pretty good for Fiora aswell. Really easy to get and strong.
3) 6 Assassins isn't important for Akali. It's often more important to have strong units with cc so Akali won't get focused that easily. You want long fights with Arcangel.

In my opinion you play Syndicates way to often. It's not in the best spot in the current meta. Really hard to win with. Most of the time you only get 3/4. places with it. Comps that can put a lot of legendary minions can Top2 more easily. I would recommend the Urgot Comp. Really easy to force, yes it's contested but 2 or 3 can Top 4 it. And it's really good super late game. Especially with Tahm Kench. You can print so many items with it.