first of all,the dmg from ragining spirit is really HEALABLE in 25 or 10
but still its bad to get it the aoe front dmg cuz it will silence u and therefore ur dps output will reduce on the spirit wich makes the 2nd spirit spawn and there the healing would be hard.
dont forget that paragon had rotation on paladins "aura mastery " to delete 5-6 infests "talking about p1+p2.