Freeman deserves a medal for all his efforts writing this extensive guides or a crux exterminatus, maybe
After reading the Deathwing comments, I wonder how many of the broken skills are so due to badly worded cards. I mean, if you remember the terrain card "Hull Breach" from Marine Pack 1, it clearly says "slay 1 GS at this location" but later it was clarified it should have read "slay 1 GS at this terrain"…
Also, with the Adrenal GS, it says "if you roll a 0 when defending, the formations shifts…" but it should have been "if you roll a 0 when defending and the engaged SP dies, the formation shifts" or maybe "every time this GS rolls a 0, inmediately attacks again its engaged SP (if the a marine was slain, shift the formation before the extra attack)"
So probably the combo between the chaplain and the angel watch action (infinite reroll) is another not-sufficiently-tested "bug"
Anyway, excellent guide again, looking forward to reading the one about SP pack 1!!