Yes, it still works. I would use a different deck to grind FGs, but having a deck that works over 50% (my experience; your personal experience may vary) against Destiny, Elidnis, Ferox, Incarnate, Lionheart, Miracle, Neptune, and Paradox is very handy with Oracle predictions. Just remember to customize the deck as appropriate (pulling Reflective Shield when the FG doesn't have Jade/Mirror Shield, Fahrenheit against Incarnate, etc.).
Also, someone mentioned subbing Fire Pendulums earlier in the thread; that helps smooth out the quanta.