[HoE] doombringers and mirv(spoiler)

[Deadlander@aol.com]

I have a question about the doomsayer power called mirv.when it is fired it 
says in the description, 'Generate one faith total and apply the result to 
all bolts'. so, if you shoot 6 bolts at 6 targets that are 10 yards away, and 
you roll 5 on your faith would all 6 hit? i would assume that you need raises 
for the other bolts to hit, but my player is arguing that they all hit on the 
basic tn. please help!
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In the main rulebook, it says doombringers are only killed by doomie magic, 
does this mean they ignore damage from guns and sykers etc? On another note 
do they get unlimited strain or is it still done on vigour? and finally can 
they use tapping, it doesn't say it in the archetype but I would assume they 
can.