The team might not like it (yet?). But:
That sounds such a good idea for a usermod in any respect.
For those people getting a high AC regularly it would be a real improvement for managing hell. So the demand is sure to exist.
So if you want to convince Kael, better start doing it yourselves, refining it and showcasing it to the community. If you get it solved in a good way, the team might like it and include it in short order.
I doubt the team wouldn't take it if it turns out in a terrific way and people like it (which i very much think is possible.)
So the result whould likely be: You get what you wish for, it has allready been done a few times, it might help you and quite a number of other users and it saves the teams time. In the end your work might even make it into the game.
Everyone happy? (I don't mod myself but i sure would happily test anything in that regard but an ugly implementation, and it hardly sounds like something which would be hard to update to a new version.)
Take a peek around for those attempts already ventured and see what you can get done (i believe someone even has tried it in the FFH2 modmods&scenarioes subforum.).
(every "you" in this post can of course be substituted by a friendly modder you can convince of doing it. So please don't take it all to much as a personal demand.

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Rest assured, the audience does exist...
From a lore standpoint: Read the civelopedia-entry for spectes and wraiths to get the picture of how the oceans of hell look like and what they feature... (very placid, pitch black and reflecting stars not of creation.
If i remember rightly that is... So bubbles, blood red, slimy green or the likes are not in line with what the background suggests.
So not spectacular, but distinct enough to be very visible if properly implemented.
Personally i would very much like if such an endeavor would be conducted in accordance with the lore.

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