I was really anti-scalp clip but after I had my epi I was lying down and the continuous monitor kept dropping out so they asked to put it on. I thought I had done heaps of research and I had a student Doula too but it is still really really difficult to be sure enough in yourself to be able to tell them NO when they're telling you the scalp clip is the ONLY way to make sure your baby is safe and happy.
So make sure you are very very well researched and so is your Doula (mine was unhelpfully silent when the request was made despite knowing I didn't want it and despite seeing my uncertainty) so that you can feel strong and safe and justified in refusing x intervention.