I have read about another option that is to have a mini
network with a buffer site.
sites 123456789 interlink and links within each other to a buffer site ( site A ) then site A links to your main site. this way site A takes all the hits if Google says wow this it a
network going crazy with link farming. but all the link juice from 123456789 condense into A. Then when A links to your main site you have a strong smoothly.