Hi sagai,
I love soup, but I wouldn't want to eat Retro Special developer.
That would be very indigestible.
Delta 3600? Did someone made a mistake in the factory or is that a wishful thinking?
Now seriously, I've used Retro Special developer, but only with R320.
You could ask Foma if they have made any tests with other films.
Also you could look at the datasheet for Retropan with times for other developers like HC110, cross-check D3200 in that one and make an educated guess as to what time would be for D3200.