I go O all the time on DX. It's my favorite map. Been that way since the 'leet strat was the shield-pack drop-n-pop cap. I was one of the few who learned how, early on, to jump and jet my way through the base, grabbing the flag on my way through.
For some reason that one doesn't work very well anymore.
So I've resorted, mostly, to long range mortar spamming the base. I can land a full load of mortars in there before the D gets out to get me, as long as no one's using nofog. And even then, there's some fine spamming spots with good references that you can't be seen from.
What a great map. I will always love it.