Ping is really the local guy for advice on this, but here's a thought that I picked up from reading through the huge sump section Marc Levenson has on his site (http://www.melevsreef.com/allmysumps.html). He typically splits the water input between the skimmer chamber and the fuge, locating the return section as the middle of the three partitions. The logic is that the fuge section gets "raw," unskimmed water that way, the better to feed the fuge critters.

FWIW,
Derry