If we did get another ap & armor item....

It should be designed for champs that don't build hourglass.

Hourglass is designed for champs with good passive dps (think brand ult), short range, and medium cooldowns. It's what you pick when you tend to get focused. What some champs need is exactly the opposite, something to prevent being picked off or run down.

Alright, so what kind of stat/passive would prevent that? Movement speed. Conditional movement speed. Hourglass prevents you from moving, making it nearly useless on champs outside of teamfights. Movement speed helps keep the assassins at bay if they're running you down, but does not nullify their burst entirely.

Here's the item. Coward's Staff - 2900g Builds from 80 ap, 45 armor, 5% movement speed (gold value of 2840) Unique passive: Upon taking 30% of your maximum health in damage in under 3 seconds, grants you 50% movement speed and 50% slow resistance, both decaying over 2 seconds. 20 second cooldown.

It has armor to protect mages from ad, but the passive helps protect them from anyone who jumps on them, provided that champ does not have a lot of hard cc. It does not prevent someone from taking damage or help that much with all-ins, but it helps keep the damage to a lower amount and gives champs the tools to dodge skillshots or avoid being run down by that talon. And Mordekaiser mains, this could be a nice anti-kiting tool, since the movement speed works in any direction.