WAVEN: Bomb Voyage! Jikan Huge Explosions!

Absolutely insane explosive Cog damage! Brutal area of effect, crazy amounts of armor, and, honestly, blowing things up is fun.
So here's what you're going to do. You play from the corner so you can only take damage from two melee enemies at once. If you start the fight with no Pendulum in your hand, use your 5AP elemental spells. When you do have Pendulum in your hand, use it AFTER your 3AP elemental spell. After Pendulum is used and Rewind occurs. You can also mix it with 5AP spells followed by Pendulum which now costs 1AP.
To be fully set up for your main attack, you need both Sinistros, Cog, and Jikan Flight in your hand, 4-5 Owl Auras, and 6 Reserve AP. This sounds really complicated to accumulate but it's way easier than you think, especially playing from the corner, and your passives make it practically handed to you by Turn 4.
Once you've accumulated everything, you want to do the following sequence. First, you need to make sure that your active Owl Aura is Earth. This can easily be achieved by attacking, since your armband applies Muddy and therefore an Earth Owl Aura and a Rock.
The sequence goes, summon both of your Sinistros, use your Reserve, you can attack again if you want for an Owl Aura that was used up from the Reserve usage, then Jikan Flight and, finally, Cog. Everything surrounding your Sinistros is immediately disintegrated.
It's also worth noting that attacking enemies that are not Muddy or already have Astral will apply Shadow to enemies around you, therefore multiplying your cog damage to them.
You will also have over a thousand armor on your Hero. Usually things die immediately but in the end game, that Armor will keep you alive for anything you haven't finished off.
So there you have it, blow things up and enjoy the path to end game.

[@feantus]

Muito bom o vídeo! Ótima construção! Quais passivas você usa nessa build?

[@pablloedu_]

Build bem diferente do meta