You can keep making these long rambling posts about your feelings OR you can decide to learn and implement the basics.
Becoming detached, setting boundaries, acting "as if" and a host of other tools to gain perspective do not equate acting like an ass hole.
Taking the "high road" is all about treating a human being (in this case your W and the mother of your child) with the same common courtesy you would treat any other human. If your W perceives that as you being a doormat then create HEALTHY boundaries for YOU and your daughter.
You can send your W any message you want but at the end of the day all that matter is what is going on with you (and your daughter of course).