Much worse weaponry and armor has been tried in combat, and worked to some extent. While it has a fair few obvious downsides, it's not unthinkable that someone would try these in battle after extensive training.
The main benefit of this would be the higher attack position (obviously) and extended reach, at the cost of reduced mobility and balance. I say ...
Fundamentally no different than stilts, and if Conan Lee can do it with spectacular style, I don't see why ancient Venetians couldn't duel in chopines.
Not all chopines are alike. Combat chopines will likely be designed to increase stability and also address the issues of falling off that clog type footwear comes with. Some kind of laces or straps or ...
Anything that slips on from the bottom up would work
Your sirens do not have and hip/leg structures to hold things on, but they would still have practical shoulders. So you just need a one piece outfit that can be pulled up and over the shoulders that is closed off at the bottom and it should hold on and keep you covered just fine.
Let me shortly repeat and interpret how you described the 'shield effect' of your cloak:
(…) if a thin one-inch sheet of light covering the entire cloak was about the strength of scale armor that the romans used?
So as I get your thought there is a thin cover of magic upon the outmost layer of your cloak which follows every movement of the cloak but (as ...
Cloaks make lousy armor
One reason the traditional armors work as armor is because they're basic characteristic makes them either difficult to penetrate or capable of diffusing the force before it connects with the body.
But the important reason is that armor is, to one degree or another, stiff.
Imagine a piece of cloth that moved like cotton and could be ...
The kind of apocalypse maybe important - a nuclear one? An ET invasion? A comet strike extinction event? A religious takeover of the entire world?
It'll determine what is left and can be used/salvaged.
The transport and practically "covered" cities scenario is somewhat similar to Asimov's "Caves of Steel" and "Prelude to Foundation". As far as I remember ...