Zos needs to Balance ToT bad. Here are some of the problems.
1. Power decks- Power decks rule the roost now. They cost very little and give you too much power. Especially Saint Pelin and Hermaeus Mora. You get Chromatic aura or the armory first turn and its over for the other player.
2.Rahjhin deck- It needs more break per card. Stubborn Shadow need at least 3, Jeering shadow and prowing shadow needs 2, this would help balance the power decks. It also needs more bewilderment cars. 1 at neutral and 2 at favored.
3. Each patron sideboard should cost more. It is ridiculous that it cost only two power to use any of the power side boards. It should be a minimum of 4. And the Sorcerers king and Rajhin should cost a 4 no matter the position no matter.
4. Make the win cap to 80 for competitive. 40 is fine for casual, but competitive needs to be held at a higher standard.