There is room in the Resolve tree to help Juggernauts who are currently struggling.

Currently people hate Iron skin and Mirror shell because past 10 minutes Conditioning is just plain better. And the goal of these 2 were to help tanks survive against aggressive lanes against each type.

However BECAUSE conditioning is flat better in any case other than that, these 2 COULD be expended for the 2 types of people who take resolve secondary. Heres what i suggest you replace IS and MS for to help fighters and juggernauts currently. Note these are just random runes but i think a change here should happen nonetheless.

Fighters: Armored Agility: After using a dash/blink/etc. Increase armor and magic resist. This would help people like if they want to spec into something tankier in their runepage. Pretty much a Tank Sudden Impact.

Juggernauts: After being CCd and while slowed, gain Adaptive AD or AP based on base AD, Juggernauts main weakness being CC, this helps Juggernauts counterattack after it while also being much harder to abuse on other classes because of the base AD scaling, As well as not oversaturating the Resolve tree with Tenacity.

And again, i feel like there is room in the resolve tree to help people who spec secondarily into it because they want to or have higher armor or mr than others. That is why i am proposing this.