So, having recently faced the 12BP monstrosity that is the Necron Aeonic Orb I've been looking over the barrage rules...
Given the following situation:
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So we've got A facing off against enemy formations X,Y and Z. Assuming that the grey block is greater than 10cm deep and fairly talll, so it blocks line of sight, so the only formation visible to A is formation X. Am I right in thinking that the only possible way of laying down a 12BP barrage is something like this?
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Basically covering as many units from the target formation as possible. Despite the fact that something like this may be tactically more advantageous:
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Given that each formation hit is going to receive 3 BMs just for coming under fire and that X consists largely of say, expendable gribblies and a large combined assault may be brewing next turn?
This brings up a couple of things:
1. Is it very likely that large barrages are ever able to target multiple formations, given that "templates must be placed in such a way as to get as many enemy units from the target formation under them as possible within the restrictions for lines of fire and range."? I'm guessing once all units in range and in LOS are covered you're then free to put the other templates where you like, so you could find yourself hoping to only be able to see one unit from a formation so you can immediately place other templates to catch a second. Come to think of it, how does this work for indirect fire? LOS doesn't come into it, so do you always have to focus on one formation? I can potentially see the logic from a game point of view, clipping two formations with a disrupt barrage for example is quite strong. But then it's up to the opponent to spread out accordingly...
2. It might be a +1 for using true line of sight? Unless the LOS blocking terrain is an actual building, let's say it's ruins, it's pretty unlikely that A won't be able to see Y and Z on the other side. This would mean you could target formation Z, and at least hit Y and Z and still be following the rules as written.
To me, the spirit of the game would suggest that the second barrage would be fine. They put themselves in that position after all and it is probably the best move tactically. I'm just interested as to how it would play out at a tournament or if I've just mis-understood the rules somehow. Also, it's not my intention to come across as at all gamey! I'm fine with the second option, it's just more epic!! I'm just interested to know how people play the rule. It'd also give better perspective on the pricing of barrage units.