[2020] An Idea for a New Tank Mythic

Hey fellow scrub and tank player here.

I know that most people are dissatisfied about the tank mythics for season 11. I feel like there should be at least a promotion of ideas for better tank mythics. I like to complain but it only does so much.

I had a (crappy) but fun idea for a tank mythic.

Dusk Batallion Armament [Anti siege]

+40 Armor +40 Magic Resist

+Additional Bonus Health Regen increased with other legendary tank items

Special Active:Grant a single Tower or Neutral Objective temporary damage reduction from ALL sources (even ally) for 20s. (Starting at 10%) This amount increases by 7% per dead allied champion apon activation. To a total of 38%. 150 sec static cooldown. (This doesnt not affect smite or specific runes like demolish)

I feel like this would be a clever tactical choice for a tank to help a team which can't team fight as well or simply is struggling deal with a siege comp. Let's say you have 3 members on your team dead and you made it out alive. They have baron and they (foolishly) try to run down mid. You can stall or force a rotation for you team to plan a counterattack. Or you can stall baron or elder and coordinate a steal. It may be broken or maybe I'm just stupid.

Any thoughts? Suggestions?