If you don't use the attack indicator the easiest way is tio hide it completely
Edit the skin definition file to replace the both entries with the below code
<Element ID="AutoAttackIndicatorButton" X="0" Y="0" Width="1" Height="1" />
<Element ID="ViolentModeIndicator" X="0" Y="0" Width="1" Height="1" />
For the portrait UI, I had the same issue but only when I used the resize vitals options. At default size it works fine.
For the vitals I just overlapped the vitals putting the character one on the right and the opponent on the left. that's my favorite setting and I put the eye in the middle.
As you my have guessed the others vitals (orange and so) are used to differentiate the mobs.
If you have the time please post a pic of your UI, it's always very interesting for an author to see how other's use our work. It might lead to some interesting changes!