Your way of dealing with him is the right way, somehow you want him to understand that you are "over" and won't take anymore of his b...s...but at the same time you still have to protect your kids from that mess he created. Taking the high road is extremely difficult but that the right one, it won't give him any bullets against you for the divorce.
Right now, you are negotiating most probably the biggest business deal of your life because it will impact your life and your kids' life for many years to come. Stay strong and avoid his baits.
I hope the proceeding won't last too long and you can finally find peace. By the way, how did you do at your job interview?
Me 52+ WH 57+ Married 20 + Piecing since 2016 (ready to give up...)