If it's a matter of writing riffs as you have mentioned, I'd just use a digital delay with the wet mix above 60% with long feedback and scrape the heck out of my jazzmaster on octave lines while distortion is running heavy. Don't be afraid of long tails on delay and reverb that dovetail each other, and try experimenting with riffs that harmonically bleed into each other well.
'Gazers I'm well acquainted with tend to use the RV-3 among others for pouring sauce all over their clean tone with the combined reverb and delay feature, and it admittedly does do the trick if you want that washed out tone. At the same time, modulated repeats on an 1/8 note or dotted 1/8 note into a reverb can be just as fun without the dizzy effect of processing the whole signal through a chorus pedal, if not less muddy(depending on degree of reverb and amount of drive).
As a fan of shoegazing and dream-pop during their heyday (Pale Saints, Ride, Slowdive, Lush, Moose), and I personally use reverb just to give space, but rather like to create depth with panned delay, leaving a little bit more of the guitar intact. Most of the "loud-shoegazey-moments" in one of our tunes is actually just "too much delay", and very little reverb. Listen at about 2:30:
http://www.youtube.com/watch?v=3HJ3eNXgkdc