I know there is some discussion about this in another thread, but I think it may need to be separated out so that it doesn't get lost and buried in that thread.
I've seen this mistake made in several online battle reports so far and I think a lot of people may not realize this. The Standard of Sacrifice is like the Heirs of Azkaellon ability on the Sanguinary Guard. IE, only models within 6" are affected and not units within 6".
This is pretty huge if you try to use this thing with deep strikers. Unless the ancient can make the charge or you daisy chain a few models back to the standard, then the unit isn't going to get any use out of the standard. If you daisy chain a few models back it will take them out of the battle watering down your assault, and all wounds will have to be allocated to those models and you'll lose the effect of the standard as soon as they die (IE, if you take 5 unsaved wounds and the first 2 take out the 2 models within 6", then the other 3 wounds won't get a chance to be saved via the 5+ fnp).
Now, it will still be good against overwatch and if you fail a charge. However, I'm not so sure it's an autotake anymore for any type of deep strike strategy.