Hi Keille,
As Magus stated it's pretty impossible to build this into a UI for EQ2.
It would actually be illegal if I understand SOE's policies correctly.
Combatstats is indeed an excellent application
Another, which has become my favorite is Advanced Combat Tracker:
Available here:
http://home.maine.rr.com/eqaditu/ACT/
It's VERY easy to use and all you have to do is start a groupsay in game and press (ctrl-v) to paste the stats in game.
Hope this helps...