WARNING(EDIT): The mythitech set won’t deliver the promised damage gains in future update since it was confirmed that it was unintended. 
I made some tests with the Mythitech and it seems to have been massively underrated.
It appears that the damage increase from Mythitech is closer(almost exact) 10% per set number and not 1% as stated in the description.
That would be a 30% increase in damage per mythic stone in battle arena. I would like to bring this to the developers’ attention for what would probably become an arena balance issue if exploited.
However, if such massive increase in damage has been intended then this would be the replacement for the bracer:
WARNING(EDIT): The mythitech set won’t deliver the promised damage gains in future update since it was confirmed that it was unintended.