How do you make your Tumblrs stick?

I have Autofill Magic. Used private proxies (squid) and registered expired tumblrs on a separate profile per proxy a few weeks back. I customized the themes but I only made 1 post on most of them. I'm checking them now most of them have been deleted. Is that enough for them to be removed? Is VPN the better route for them to stick? What do you do to make them last?

Vpn is not a better route.

Take your time with them and when you register them only do 3 a day MAX. (On each IP)

You can register them with your household phones to (dont use wifi) so each account is being registered on a different ip & hardware.