I think there is a better tweak to J4 in place of his recent shield buff. Allied AR/MR Arena buff

Im referring to these changes:

-Shield reduced to 50 / 80 / 110 / 140 / 170 from 50 / 90 / 130 / 170 / 210 -Per-champion bonus shield increased to 20 / 40 / 60 / 80 / 100 from 20 / 30 / 40 / 50 / 60 -Radius increased to 600 from 500

It is technically a power shift to his teamfighting at the cost of single combat but in my opinion its a net buff considering the increased shielding amount, but I still dont think it was the best option, and would like to see a bit less power here in place of a defensive mechanic added to his ultimate.

E.g. Revert shield buffs(maybe keep radius at 600) and grant all allies inside his arena 30/40/50 armor and magic resistance.

At first you may think that seems too strong but consider it only lasts 3.5 seconds or less if necessity calls to collapse the arena walls for allies to escape.

J4s entire playstyle revolves around his ultimate which is meant to enable himself and allies to win the fight but in todays meta it is becoming more and more difficult to make it work in favor of j4 and his team rather than in favor of the enemies.

More often than not I am forced to prematurely collapse the wall for myself or allies to escape, or the enemys likely have multiple dashes to pretty much ignore the wall, which in most cases makes this ability only good as an aoe damaging spell.

Adding a defensive aura within the arena will give the needed incentive to stand and fight within it, not having to worry so much about wiping your own team.

P.s. Perhaps it would be most balanced if the AR and MR were based on a percentage of Jarvans stats.