I've started doing this. It works pretty well but you do loose a lot of volume knob dynamics.
But even if you have a really, really killer OD pedal, it's not gonna be as cool as getting the natural gain out of an amp that was built for that... The DSL gets pretty bad sounding (mushy, blurry) when you push it too hard, whereas a recto was specifically designed to maintain clarity and punch with an ass-load of gain. You don't need to push a dual rec with anything to get it to do that, either.
IMO the DSL runs out of useful gain on the red channel/lead 1 with the master around 5 and the gain also around 5. Anything more than that (including boosting the crunch mode too much) and things get way blurry. It's hard to balance any kind of clean tone with that because of the shared EQ. There's too much difference in the bass! I dunno, maybe a Mesa is your best option.