I'll just say that as someone who uses both an athame and a mezuzah, I'm interested in the possible connections that can be drawn between them. Do you integrate this connection into any of your practices?
In practice, I only use the athame presently. My mezuzot are stored away in a chest. When I became a ba'alat teshuvah over a decade ago, my professional livelihood was deliberately destroyed. I've stayed with relatives for the past several years. I can't put up a mezuzah.
Of course, I'm sure my enemies are quite pleased with the fact that I can't put up a mezuzah. Nevertheless, I don't need it. It's like all the other rituals tools - the only real tool a witch needs is herself. I truly know this now.
A few days ago I had a vision of a metaphysical fist being flung toward me, and of it being deflected by an invisible shield around me. I was only able to "see" the shielding force by the "reverberations" in spacetime and shapeshifting coming off the dark light (which the shield was made of) as the striking fist impacted against the field which surrounded me. I never take my circle down. It goes with me wherever I go.
And every shabbat and with every ritual, I reinforce it.