This is a UI I've been working on the past few days. It's still heavily under work, just trying to get a feel of any ideas you guys may have:
In a general sense, it's made mostly for enchanters, as far as positioning and windows are concerned, however I think it would be useful for any caster class.
1) The auto-attack red flash surrounds the target, not the player. The actual target and player windows have been reversed to make this possible.
2) The pet window contains the 4 most used pet commands: Attack, Guard, Back, and Follow.
3) The cast spell bar is between the player mana and the XP bar in the player window. It shows only when casting a spell. There is no stamina bar.
4) The hot buttons cycle colors when you mouse over them =P
5) The HP bars are all multicolored. This isn't necessarily good for clerics, even though I can read it just fine. But it's easily changeable with a graphic change and color changes in the window_pieces01 and appropriate XML files.
It's a continuing work in progress. I'm adding new features and changing current ones as I type.
http://acad.stedwards.edu/~efugate/newui04.jpg