What to do after finish Chaos 5 with ease?

Well I wonder what if we can finish chaos 5 (even without next coming patch).. what else can we do beside grinding for unknown shard?

It's almost the same with nm4 you got iPWR 780+ then you only have daily missions/weekly to do. 

Congratulations, you're in the top 1% where you've reached the point of "Easy Mode".
Now, you're either going to wait for Chaos 6+, or min-max your hero deck with BiS gear.

I doubt you already have all your heroes at max values.

stop using flamethrowers, Frosty freeze and abyss lord dps, and start a non cheese build.

Eventually though, you will have nothing to do if you are in that top bracket, then its just like wow, wait for new content.

I grind for shards and ascension levels :)

Also i play fun builds. I'm waiting for the patch for more fun build variations in c5.