Reasonable buffs to make tanks viable again without breaking them

As the title says...

(51% Win Rate): https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Chogath/Top/

R: Feast

Bonus health per stack increased from 80/120/160 to 120/140/160

New Effect Enemy champion takedowns reset Feast's cooldown

(46% Win Rate): https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Galio/Middle/

Passive: Colossal Smash

AP scaling increased from 50% to 100%

Q: Winds of War

Damage increased from 70/105/140/175/210 to 80/115/150/185/220

AP scaling increased from 75% to 80%

Tornado damage increased from 6% all ranks to 100/145/190/235/280 plus 4% of the target's maximum in magic damage (80% AP scaling plus 1% per 100 AP)

(47% Win Rate): https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Gragas/Jungle/

W: Drunken Rage

New Effect Gragas shields himself for 10% of his maximum health (2% per 100 AP) for 4 seconds

(51% Win Rate): https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Maokai/Top/

W: Twisted Advance

Damage increased from 50/75/100/125/150 to 9/10/11/12/13% of the target's maximum health in magic damage

AP scaling changed from 40% to 3% per 100 AP)

Root duration increased from 1/1.1/1.2/1.3/1.4 seconds to 1/1.25/1.5/1.75/2 seconds

E: Sapling Toss

Damage increased from 25/50/75/100/125 plus 7/7.25/7.5/7.75/8% of the target's maximum health in magic damage to 75/100/125/150/175 magic damage

AP scaling changed from 1% per 100 AP to 75% AP scaling

Saplings deal double damage in brush

Sapling duration increased from 30 to 30/35/40/45/50 seconds

Sapling duration scaling removed

(50% Win Rate): https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Ornn/Top/

W: Bellows Breath

New Effect now shields himself for 14% of his maximum health for 6 seconds all ranks

R: Call of the Forge God

AP scaling increased from 20% to 100%

:

W: Steadfast Presence

New Passive: When Poppy takes non-turret damage higher than 10% current health, she reduces the excess amount by 50%.

(51% Win Rate): https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Sion/Top/

W: Soul Furnace

Bonus health increased from 4 to 6

(51% Win Rate):

Q: Twilight Assault

AP scaling removed.

AD scaling added (2% per 100 AD bonus magic damage; 2.5% per 100 AD increased bonus magic damage)

Deals 60% bonus damage to minions

E: Shadow Dash

Taunt duration increased from 1.5 seconds to 1.6/1.7/1.8/1.9/2 seconds

(48% Win Rate): https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Alistar/Support/

Passive: Triumphant Roar

Heal increased from 20-139 per level to 4/6/8% of the target's missing health (Levels 1, 11, and 16)

(50% Win Rate): https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Blitzcrank/Support/

Q: Rocket Grab

New Effect Rocket Grab now refunds its mana cost and cooldown upon hooking a enemy champion

(48% Win Rate): https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Braum/Support/

W: Stand Behind Me

New Effect Braum and his ally now gains a shield up to 80/100/120/140/160 plus 6% of their missing health

(50% Win Rate): https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Leona/Support/

W: Eclipse

Bonus armor and magic resist scaling increased from 20% to 40%

New Effect shields herself for 12% of her maximum health for 3 seconds

(52% Win Rate): https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Taric/Support/

Q: Starlight's Touch

Mana costs decreased from 70/80/90/100/110 to 50/55/60/65/70

E: Dazzle

Stun duration increased from 1.25 seconds to 1.5 seconds

(53% Win Rate): https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Amumu/Jungle/

R: Curse of the Sad Mummy

Cooldown decreased from 150/130/110 to 130/110/90 seconds all ranks

Damage increased from 150/250/350 to 200/425/650

AP scaling increased from 80% to 130%

New Effect shields himself for 8/9/10% of his maximum health for 3 seconds (1% per 100 AP)

(53% Win Rate):

W: Defensive Ball Curl

New Effect is now immune to true damage during Defensive Ball Curl

(52% Win Rate): https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Sejuani/Jungle/

E: Permafrost

Stun duration increased from 1 second to 1/1.25/1.5/1.75/2 seconds

R: Glacial Prison

Glacial Prison now stuns multiple enemies

New Effect Enemies within the zone are now grounded

(49% Win Rate): https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Zac/

Q: Stretching Strikes

AP scaling increased from 30% to 60%

W: Unstable Matter

Damage increased from 15/30/45/60/75 plus 4/5/6/7/8% of the target's maximum health to 75/100/125/150/175 plus 6/7/8/9/10% of the target's maximum health in magic damage