5* Knull or 5* Awakened Colossus (low sig)

LOGAN1738

I'm on 6.2.6, and I think I can solo the champion with Sorcerer Supreme but I was wondering who would be more useful in general between these two? I've heard good things about both so I wasn't sure.

LOGAN1738

Here’s what my current 5 and 6 star roster look like rn:

GinjabredMonsta

Knull

I've used colossus for a lot of fights through act 6 and beyond and he rocks those acts with a synergy team. Knull is my new favorite toy though and dude is a monster. Colossus relies more on synergies for those high yellow numbers but knu can do high red numbers

SirGamesBond

Knull

Colossus isn't bad either, he covers so much ground with his immunities.
Gotta rankup what you need.