Another technique that I have found useful is tack soldering wire-wrap wire to solder pads on pad per hole perfboard. The Kynar insulation is heat resistant and does not shrink or burn. I usually install solder tail sockets and then follow with point to point wiring. Multiple wires per pad require some care in soldering (the wire has spring and tends to pull away as the solder melts). Quite reliable and efficient for someone skilled with a soldering iron.

For an example: http://www.chd.dyndns.org/sbc/68k_back_half.jpg The most dense area is about 3/4 inch thick.