Honestly at school we use trusty alenes tacky glue and we cheat with good ol fashioned water putty yes water putty - the cheap stuff that everyone used 40 years ago - and top it off with a fun paint job to “disguise” and enhance. No matter what you do or how delicate you go it’s going to look altered/broken so why not put a broken leg cast on it…go for a humor route…or make a metal gear leg…steampunk it out or just slap it with some sculpted fish and make it look like it’s eating or catch it in a net or have it shoot out lasers.
Honest to goodness breakage has lead to some wonderful alterations with my kids. One girl had a head explode and made it into this whole Chicano pride thing it was awesome…she a scholarship with it.
Side note:
Bisque fix works wonderfully but you’re beyond that now (for school it get’s expensive with 60+ kids so it’s a rare use but for personal works I would recommend)
I’m also fond of a quick vinegar-heavy paper clay fix pre-kiln. AKA slip with some school toilet paper slopped with some vinegar - Oldie goodie easy peasy elementary teacher taught me that one.