Link Wheel advice needed

I am about to create a link wheel as well. Is it a must to vary anchor text to all nodes or single anchor text is enough?

e.g. backlinks to node 1 , 1 anchor text only = green widget

e.g. backlinks to node 2 , 1 anchor text only = green widget


e.g. backlinks to node 3 , 1 anchor text only = green widget


e.g. backlinks to node 4 , 1 anchor text only = green widget


e.g. backlinks to node 5 , 1 anchor text only = green widget


e.g. backlinks to node 6 , 1 anchor text only = green widget

Lastly, close the loop or not?

Thanks