I guess I could try shooting it at ISO 50. But then I could use Vision3 50D instead, also virtually grainless but I've had a lot of luck with the ECN-2 stocks. Contrast can be managed upwards in RA4 printing (by adding hydrogen peroxide), but regrettably, not downward.
I'm also wondering if Ektar is intolerant of even the slightest processing error. Maybe it is a film that should always be sent to a professional lab, or at least always only Kodak developer used.
As for Fuji, how different was the Pro C film from the Pro S? I have lots of Pro S, but I'm not sure if I like the grain.
And as for the Ektar, I have been printing it on Crystal Archive C, which I get good results on with Portra; maybe I should try printing on Portra Endura, which I also have on hand.
Actually, you can use bleach exposed paper, in a very very dilute bleach, like you do with black and white printing.