The best results are achievable when all 6 BE junction are thermally coupled. Then, you have to do the math, if you know TC for all forward biased junctions at working currents.
This is my latest amp with ThermalTrack BJT's on output stage. It has only -5mV drift over Re's from 20 to 70grdC. I have 4 BE series junctions on the output stage, 2 on CFP driver and 2 on output BJTs and 5 NJL diodes used to compensate thermal drift.
http://www.diyaudio.com/forums/attachment.php?s=&postid=1313491&stamp=1191162639
http://www.diyaudio.com/forums/showthread.php?postid=1313489#post1313489
