to avoid the cake dome, i put my cake in a water bath...just like a cheese cake. once the cake has risen, it take it out of the bath and then let it bake some more until it gets dark. comes out perfect each and every time.
I actually put my cakes in a water bath, similar to when I make cheesecake. My cakes are moister, they rise evenly...and they do not have that dome in the middle of them anymore. You can also use the strips that Wilton makes that you can wrap around your cake pans. But the water bath is cheaper and easier.