kraken gun WITH EBON PROC deals less dmg than average myth + hyperos set WITHOUT ebon proc.
kraken gun without ebon proc - 20% on hydra
kraken gun with ebon proc - around 50%
hyperos with average mythic set - 75-80% (no ebon proc)
i used arc sapphire + h garlic + h tadthep
Also, I tested it on sunken boss and results are similar = hyperos without armor proc deals more dmg to boss.

To the people who are saying that kraken gun with kraken armor is good:
1. kraken armor isn't easy to proc.
2. Try mythic set hyperos + kraken armor proc, u'll be shocked.