Awareness is still great with RI even if mobs are all in front of you anyway. Crit comes before parry, so if RNG decides that a mob will crit you, even from front with RI up, you'll not parry. Using Awareness with RI makes it 100% sure that you WILL parry everything from front.

Whereas flash... I personally almost never use it on WAR (if ever at all). It is only useful when you poorly timed your Berserk and you're pacified when you have to pick up adds and the healers are too bad/too focused on anything else to dispell you.