They all precede the development of others, making the way easier for those who come after.
But Ruptga doesn't have any association with time that I can see.
Well he creates Sep, which pretty much nails him as atleast some fusion of some aspect of Aka.
And the only sense of time in this mythos pre-mundus is the inevitable self-eating.
Ruptga learns and teaches the walkabout.
In transcending the self-eating he becomes beyond time, immortal.