Could we get a new tenacity item?
This would be a tank item that scales with other tank stats, and shares a new unique passive with mercury's treads. (You can get both, but only receive 30% tenacity total) This way we'll be able to get ninja tabi, Boots of lucidity or even boots of swiftness without being too penalized by lack of tenacity. Due to it scaling off of tank stats and offering 0 offensive stats marksmen/mages will have little to no use for them.
Tenacious Cape/Grieves etc:
+
+ 500 combine cost = 2700g
210 Health. (PH, This is a placeholder stat, they are all subject to change) +5% max health. (PH) 10 Armor. (PH) +8% Armor. (PH.) +150% Base health regen. Unique Passive - Point runner. Unique Passive - Tenacious wind. Grants 30% tenacity.
I personally think the +% stats will make it viable only on full tanks while not being beneficial to fighters or squishies in the slightest. This is just a general idea that I've come up with. I'd be perfectly happy to change it.

exist, it also begs the question: why would any squishy would want to abuse a tanky tenacity item?
Was a fighter designed item that was easily abused due to it's really cheap stats and strong passive. Furthermore they've been aching for a tenacity item ever since zephyr was removed. Imagine though how strong 35% tenacity on a marksman really is.
Marksmen and assassins are the roles most likely to abuse items, so I simply chose to cover the bases.
Having a solid HP bump to survive an OHKO combo is also pretty useful.