[keezyrick]

The code was changed considerably to make way for the effects data (arcane, trauma, etc.) among other things.

It is not a task for the faint of heart. You should be able to find compact modes in most of the custom UI's on this site. They are sometimes called out as alternate files in the distribution zip file.

Fetish is my UI of choice and has an extremely compact Raid window by default.

Profit also has features to turn off group separation bars and so on to make the window more compact.