Reference file say...

BuffTimedChargesPlacing.entity

entityType "Buff"
onReapplyDuplicateType "PrioritizeNewBuffs"
buffStackingLimitType "ForAllPlayers"
stackingLimit 1
allowFirstSpawnerToStack FALSE
buffExclusivityForAIType "ExclusiveForAllPlayers"
isInterruptable TRUE
isChannelling TRUE
numInstantActions 2
instantAction
    buffInstantActionType "PlayPersistantAttachedEffect"
    instantActionTriggerType "OnDelay"
    delayTime 0.000000
    effectInfo
        effectAttachInfo
            attachType "Above"
        smallEffectName "Buff_TimedChargesPlacing"
        largeEffectName "Buff_TimedChargesPlacing"
        soundID ""
instantAction
    buffInstantActionType "ApplyBuffToTargetNoFilterNoRange"
    instantActionTriggerType "OnBuffFinish"
    buffType "BuffTimedChargesActivated"
numPeriodicActions 0
numOverTimeActions 0
numEntityModifiers 1
entityModifier
    buffEntityModifierType "DamageAsDamageTarget"
    value
        Level:0 0.500000
        Level:1 0.000000
        Level:2 0.000000

In game, however scout take 50% damage debuff instead target.