Digital BW, The Print

I'm trying some color ink experiments with Generations, trying to use my still half full CIS bottles on a 1200. This seems to be 
a popular combination for color so I thought I'd ask this.
I've been working with Royal Plush and Somerset Enhanced. I've tried every media setting in the Epson driver, and every 
media setting in PressReady, and made profiles for both drivers. There seems to be no way to make this ink work on these 
kinds of papers without mottle in some colors, even colors that have a fairly low total ink density on paper.
I'm about ready to just pour the rest of this stuff down the drain and am mystified why it's so popular. I realize the 1200 puts 
down a lot of ink, but some of these colors that have problems are not that ink intensive.
I wanted to try some toned B&W before I bagged it, check metamerism etc., but have pretty much had it.
Anybody have better luck with generations, any suggestions?
Tyler