Battlecast Rebels Patch 10.16

The most important thing about this comp is prioritizing items on Zed, Cassiopeia, and whichever tank you choose. It's very strong against AD comps and sniper comps because Zed can steal their damage and wipe them out early. This comp is weak against high AP comps and sorcerers.

Early game can be a bit weak but this comp just gets stronger later into the game.

I included a comp version (#3) down below that focuses on the best items for each champion in this build.

I'll explain some of the items that are VERY strong with this comp:
Blue Buff - Cassiopia has 25 mana, which means Blue Buff is insanely good on her. After each spell cast, her mana is set to twenty, meaning she can pretty much cast her spell over and over again and do INSANE amounts of damage.
Deathblade - Zed's spell allows him to steal damage from the enemy, and the death blade just makes his damage levels huge. Paired with an infinity edge, he can wipe out the backline with ease.
Warmogs & Locket - Malphites spell grants him a shield based on a percentage of his max health. Warmogs paired with locket of the iron Solari AND the shield granted from his rebel trait make him an unkillable tank.
Red Buff - Kogmaw isn't a very strong blaster, but this item helps him pick up some more damage. It helps him shred through the enemy front line, allowing Malphite and Illaoi to stay alive (and protect the backline) much longer. This item is super underrated on him.

Early Game positioning:
Place Illaoi and Malphite on the frontline, with Kogmaw and Cassiopia two rows behind them. Put Zed in one corner on the backline and Nocturne on the other, so that they can quickly target snipers in enemy comps.

Late Game positioning:
Keep Illaoi and Malphite on the frontline, with Jinx and Zed directly behind Malphite to get the most use of the rebel shield. Kogmaw should stay in the upper backline, while Cass can either go beside Jinx (to protect her from damage) or on the upper backline with Kogmaw. Nocturne should be in the backline corner opposite to the side Zed is on.
This is a very underrated comp for 10.13 and I'd recommend giving it a try!

This comp works well in several galaxies, including the new one (dwarf planet).
At level 8, add a mystic of your choice or another battlecast.