I dont think you will over skim a tank. IF you see what are my plans for a 10g hex you will se there is not such thing as over filtering a tank.
The sistem will consist on 3 tank. The display tank( 10g Hex Tank), a sump( 10g tank), and a Fuge ( 20g long tank)
For filter I will have 10# of LR on the main display and 5-10# of rubber on the fuge. In the sump I gonna put a Corallife Skimmer 125. That a skimmer for a tank more than 10 time the size. The fuge will be divided in 5 areas. The first one were the water come from the sump I will keep the rubber, the I will try to keep the Mermaid's Fans or Red mangrove, on the third one SHaving Brush, fourth one Caulerpa, Last one were the water will go from gravity to the main display I will keep the chaeto were more pods grow and will feed teh tank. Also the fuge will have a 4" DSB.
I deside to do a fuge like this separeted in case that I have a problem with one of the macro and plant it will be easy to work with it, specially with the chaeto and the caulerpa.