There's an Ancient tier of affixes coming up and i have an idea that in tome towers there would be 0.1% chance to find ancient affix tome with +1,+2,+3,+4 or +5 to all stats of the item, and when you combine at smithing table mythic item with this tome, the stats are added and the limit like +8 max health is gone. I think that the most important fact of this idea is removing the limit for stats.
That's my idea only but i think it's good and balanced at the same time because it's only in one structure in the game and you have to get mythic item first
Have a nice day and i wonder what do you think about this idea!