Er, the extension has a global one and local ones on all the other wikis now, and just sort of merges those on those wikis, so if we converted to use that, uh...

Isn't this used on brickimedia production? It shouldn't be too likely to explode.

You could also do fancy things with contentmodels.

For reference, even if some of it might be a bit redundant:

I forgot what page three is, but remove any redundancies, clarify any unclear bits, group related bits, etc. Basically like the page 1 changes.

For page two, make it out like sections for each skin, with a big checkbox by the title of each. Technically the entire thing is a table, as such:

Also note that the form styles like the buttons and stuff should actually be provided by the skin or mw-ui/oojs; unfortunately none of the skins actually do, and stuff. But the padding would be standard form padding; the blue button would be standard progressive, etc.

Mockup for the first page: