An experienced trauma informed therapist won't ask about events or push. It all pops up on it's own during therapy. Memories just seem to automatically unpack as soon as you process one set. The experienced trauma informed therapist is what's key with whichever approach you take. I'm pretty sure I wouldn't have been able to treat myself. I'm pretty sure whichever therapy you go with, it's gonna suck and hurt.
CBT is fantastic for CPTSD. Current latest big success is breaking treatment resistant depression, but that's also a result of a lot more. Dysthymia (persistent depression) was one of my issues. I always felt like I wanted to die, like I should die, and/or deserved to die. It happens sometimes, but it's usually fleeting and been occurring less over past few months. We're working on general anxiety disorder symptoms atm.
CPT is a CBT based method developed specifically for treating PTSD. It's basically a structured way to process the memory and emotions on your plate as well as the behaviors and beliefs that result. From what I've read about IFS, CPT is more direct, painful, and yes you do end up reliving experience. During therapy it does get worse, and I suspect CPT also has a higher drop rate. However, end results I've had are good. I don't have issues with processed memories; they're just bad memories now. Most phobias, beliefs, and thoughts are gone.
Many symptoms are gone. I still have several symptoms, but those are slowly subsiding. I was interested in trying IFS to see if another approach could help speed that along, but I'd be doing it on my own.