with uvls the best spec for u is demonology. without simcraft i would say equip wushulay and uvols.
if you dont like demonology and got LMG already, you also can try affliction, but 502 uvls is proccing not very often so i would rather use talisman and wusho.
if you dont have LMG spec destru and use wusho but try to get another int procc trinket, haste procc is not good for destru.
Or go balls deep crit and prep for 5.4 demo without UVLS? At BiS you can get demo reasonably close to UVLS except for the fact the opener still jumps up 20K'ish due to UVLS. Though I'm still not sure how we should be setting up for 5.4 if we are staying demo but I digress. Obviously if making a last minute push optimize for 5.3 mechanics...