Hi shredderman,

Personally, I would chain them like this:

blues driver, compressor, wa, echo then run the reverb through the effects loop.

I not sure about the compressor position because I don't usually use one. I've found when I run effects through the amp's loop that there is a slight drop in sound quality, so I usually skip the loop all together. I'm thinking that the reverb in the loop would be OK, though.

Hope this helps!