Unfortunatly in my experiance, a conditioner bar has to be specific for your hair type to get best results. Unless your one of the few lucky ones who can use anything and have fab hair..So sharing a recipe that works for me may not work for you.
Example. My dry hair bars contain BTMS, cetyl, mango butter/mct/rosehip with oat protien, honeyquat, CETAC, silicone sub and chamomile extract etc
My oily hair bar BTMS 25/50 mix, cetyl, lil shea/fract CO/argan with honeyquat, CETAC, marshmellow extract, silicone sub and chamomile etc.
I have Swift crafty monkey's 2 books plus Bespokes shampoo and conditioners book(much perfer Susans SCM). From those and reading lots if blogs I learnt the why you add what etc. And what each hair type likes.
Having said that evey ones hair is different, our water softness additives etc are different. So long story short if your serious about making good shampoo and conditioner bars its a steep learning curve but a great journey.