Reducing upgrade cost (+time)
We live in an Age of Timings. So obviously this is one of the huge disadvantages of the line in the midgame. It’s just too expensive to upgrade to a “usable level”. Archers basically only need the Attack upgrades (+ xbow) and don’t cost food. Knights are often usable without any upgrades on them.
But for the Militia line - only to get them to a “usable” state you need the Armor, Supplies and Unit upgrades. Often even more like attack and speed.
If this stuff was cheaper we could see way more of them in the midgame where it’s current weakest phase is.
It would probably again require a small compensatory nerf in the Imperial Age.
I’m not too sure how much this would influence low elo. But I guess it would have a way bigger impact on higher elos as there res efficiency is so crucial in these timings. Nevertheless it will also buff the line on lower elos where it isn’t even bad currently. And probably needs some changes because of that.
On it’s own because of that Risk it is probably just B-Tier. But with some other changes and tweaks (like moving down the upgrades but removing Supplies) it can bring the line up to A-Tier quite comfortably.