I haven't built the DH2 yet but I made the Fee a few years back.
The rigging certainly looks daunting, but it is far from it in reality.
If you have rigged other types before, you will have your preferred method of attaching the lines, use of eyelets/turnbuckles etc. With the Fee, you just simply apply the same techniques, but there is just a damned sight more of it!
The key thing I found, was to take plenty of time to study the rigging diagram in the instructions, and also reference pics (including builds on here) to further illustrate line routes, connections etc. Once you have that in mind, the rigging is relatively easy.
The tailplane/rudder assembly can be partially rigged standalone, as can the booms. As others have said, work from inside to outside.
Plus with the Fee the gap between upper and lower wings is quite big, so there is plenty of room to handle the rigging.
Good luck!