The add effect of rain of death is -10% evasion to the target, is this basically the same as +10% accuracy to the party?

If it is, could this be used to increase raid damage? Fitting with bards support role.

If every 20 seconds you gave up a bloodletter for a Rain of death to keep that -10% evasion down up on the enemy then the party could drop acc gear for something better like crit or det or even a higher Ilvl piece with less acc on it, if you and the 7 other people in your party could lower their acc requirements in exchange for you giving up 50 potency every 20 seconds would this not be a large damage increase for the group overall?