In the Agfa process it is supposed to be continuous shaking for the first minute for the developers followed by two inversions every subsequent 30 seconds, except for the bleach-fix which must be agitated using two inversions every twenty seconds.
I have the same kit [agfa process kit 70] I shake like you describe but I want to know what change on the film with a different shaking. What film do you use with this process?
I guess you would get higher contrast the more vigorous the shaking.
I use Agfa Optima 100 mainly. But I've never experimented with different degrees of shaking intensity.