As a PLD, flash into riot blade isn't obselete esp if there are more than 5 enemies hitting you. One tip i share whenever i encounter those types of dps is to cycle my enmity ws to each.... That is savage blade on 1, then switch to the other then halone. Make sure you keep on using flash, riot and cos in between. Oh and shield swipe. If it's a trgger happy BLM/SMN, then it's just flash, riot and cos. Little to no room to cycle single target enmity moves.