Board Thread:Support Requests - Designing Your Wiki/@comment-5716479-20130617060407/@comment-1330470-20130617150108

Monobook users are generally experienced and power users, who don't mind a lack of Monobook customization (preferring the skin for its general usability).

As long as everything isn't utterly broken, you should be okay. Two tips for this: 1) Make sure your color schemes aren't hilariously different (e.g. white-text-on-black for Oasis, black-text-on-white (default) for Monobook). 2) Every once in a while, append ?useskin=monobook to your URL to check pages - especially the Main Page, which is subject to common breakage due to unclosed tags.

If you want a Monobook theme but don't feel like writing it, try contacting monobook.