Hello! I'm Frobei and I've been Challenger multiple sets (Set 9 and 9.5 included)!
I had the opportunity to play around 30 games on Set 10 and I tried many different comps so here I just want to share with you some cool stuff to try to have fun!
PS: I will not spoil everything because I'm sure you want to try some stuff yourself!
EDM Jax
































EDM is a really fun synergy with many different interactions. When you Sample Jax for your EDM, every EDm units will jump into the pack of enemies and deal AOE damage. I was surprised at first but this deals an insane amount of burst damage.
I recommend to play this comp if Jax EDM headliner but it's playable with Jax Headliner Mosher
EDM Lux


































There is a small tech with EDM Lux. You can block Jax in the corner so he cannot die and then he would copy Lux's spell and target the same way Lux does to increase even more the damage.
Headliner Lux has naturally the ability to crit with her spell, this is why giving her some flat AP with Rabadon and then Guardbreaker is a nice trio for the items.
Twin Terror Riven





















Twin Terror replaces the augment "Double Trouble" and it is an excellent augment to play Riven / Yone reroll. So if you have this augment, aim for a Headliner Riven or Yone and fill the synergies based on your headliner. Eg: if Riven is your Headliner with bit then play 4 8 Bit (or 6 8 bit if you have the emblem).
I haven't had the opportunity to try it but I got obliterated by it!
Twisted Fate Disco Dazzler


































Twisted Fate is a really cool 4 cost AP carry but he's not very intuitive. His damages scale is based on his AP and Atack Speed (every X% bonus AS he gets to throw one more card with his ability).
I'm not sure if Guinsoo is that good on him since he gets a lot of attack speed from the Disco trait and some fights are too explosive so I prefer to have Nashor's Tooth and Guardbreaker to have more damage while still having a good amount of attack speed.
Punk Twitch


































Everyone is trying Punk Jinx but no one is trying Punk Twitch. The board above is the board if Twitch's headliner trait is Punk.
So Twitch has a spell that resets some of its damage at every crit and this is why you want to have at least 4 Executioners with at least one crit item like Guardbreaker but you can have Infinity Edge instead of Deathblade.