[Darvin]

So it's the unit that makes the kill that gets the experience? The consequence of that is that is that high damage units tend to get all the experience. This leaves little experience for the lower damage (so called "tanking") units that are covering those high damage ones. I personally like the Warcraft system where every allied unit within range of a kill shares the experience of the kill (although in that game, it was only heroes and not units, but the same principle applies).