I tried to create UI most similiar to the original one, in the way that it block as least screen as possible, while giving access to plenty of quick-slot icons. The idea is to use first two bars for abilities, and the third one (the "double-decker", as I call it) for buffs/mounts/recharge etc. Pardon the mess in skills buttons.
First version, created by drag-and-drop in game
Second version, created by slightly editing the XML file. Should be more centered and symmetrical.