How about calling them what they really are?: Men
Men are not, and never will be women, no matter what they believe, no matter what they pretend, no matter what they have done to themselves to try to become pseudo-women. That’s just hard, immutable science.
And it is most certainly not “oppression” to decline to recognize anyone as what they clearly are not.
Why should real women have any need for a “cis…” prefix, to distinguish them from fake women?