Series Text Progressive Rotation

Someone has asked this already, but it was a long time ago.

When editing the Series item we can make the numbers grow in size progressively. We can also rotate them, but that applies to all numbers equally.

I'd like to have an option to rotate them by their index: $30*[index]$

This way the number 12 would rotate by 30*0=0, 1 by 30, 2 by 60 ... and that would create a perfectly aligned clock automatically. No need to paste 12 overlap groups individually anymore.