Hi Llewanda
Even though the pulse doesn't fit CHJLGMLT, if you do acupuncture, try tonifying GB points. If the pulse improves then that is your formula.
Even if it doesn't, we should probably try it. A big benefit probably comes from its content of Da Huang, which acts to reduce extravasation and sequestration of platelets and RBCs in the spleen. So given that you've managed to hold him with just pred when using XCHT, adding in or replacing the XCHT with CHJLGMLT might take him to the next level, and reduce the need for immune suppression. The response can be fairly rapid, so if he is not in immediate danger, maybe give him another week or two to respond, before giving up and using immune suppressants. Note that Bupleurum formulas do not interfere with immune suppressant drugs, but often lower the dose required for them to achieve full effect. In other words, there is a natural synergy there that can be exploited.
For the soft stools, consider concomitant Bu Zhong Yi Qi Tang, especially once you get the indices under control. Another option is Yi Guan Jian. Both can work with Bupleurum formulas to address loose stools
Hopefully this helps you out!
Steve