Ah, I see :)
To get data from clones you need to use MoGraph data node. Then, by changing index value you access specific clone. Here is a quick example
Assembly_0003.c4d
Now, what you want to do and expand on this setup is to calculate the difference between initial clone rotation and end rotation, and use that value for you range which will drive offset in cloner during one interval (you have to accumulate this value, python node can do it easily). As a result, with each interval, offset will be added whcih corresponds in "amount" of rotation. Hope this helps
Cheers