Combining Sweet Spot Plans

Hello, I am now in the weight building program. After that, want to complete the sweet spot 1,2,3
But I have already CTL of 80. Should I start with SS2, and then SS3? Or start my base with SS1,…
Is the idea of ending a 6week plan with some rest and then a high volume Z2 week(training camp style)?
I know the benefits of Z2 endurance. It will be my first season doing SS base. So wonder if i can put some Z2 volume weeks ending a SS plan will have some benefits?