I don't really use handmaiden, nor do I use peaktrans, because especially the second one, distorts the issue. As I've said to the point of tedium on this board, the only reason trans anything is relevant to feminism is when it intersects with women's rights and protections.
Now, sadly, that appears to be much more than you might imagine, but I don't like 'peaktrans' as a word because it puts all the focus on trans, and that's just not the point.
With handmaiden, as I've said, the correct understanding of the term is important because it's not just about disagreements, it's about being actively more pro man than pro woman, but as so few people seem to grasp that distinction, I think its on balance ,unhelpful.
However, I'm quite happy with people using whichever terms they choose, and defending their own usage if challenged, cos we'm all big growed up lasses here.