Just finished Forging the Pact (personal story) again. I’ve played through this personal story chapter many times with guildies. It’s way too long. It becomes grindy (i.e. you just want it to end and don’t feel challenged). It’s understandable you would have some long personal story chapters, but for future expansions please consider a much better balance of short and intense personal story chapters vs long, grindy ones.
I have a black-list of personal story chapters I will not run with friends unless I’m begged to do so at this point because they are such a miserable experience.