[3.5] Is Whirling Frenzy a bad Rage variant?

[Myrmex]

Parties can be warned beforehand, and, say, have a readied action to close their eyes and look away from the flash. The monsters won't know you're going to do it, unless your DM is a jerk and has all enemies constantly walk around with free-readied actions to close their eyes if someone throws a torch at them. Not foolproof, but if you're using it as a pre-planned tactic, it doesn't endanger your party at all.

So the party gets a +2 circumstance bonus on the will save to avoid the flash. Still not very awesome, considering the save on that flash is likely to be near 20.