Originally Posted by
Charon
2 reasons:
1) it becomes Str 9 Heavy 3 Barrage, Large Blast. That means you have one try to hit. If you do not, the whole barrage will go to waste. Personally I feel better with 3 tries.
2) Str 9 is not a big deal. As monofile wounds against I (which is hardly bigger than 5 for most armies) you will wound on a 2+ anyways. Instand death gets better but this is a detail and not worth the additional nightspinners.
I do not even think the squadron is any good. The combined fire is not really worth the points and I'd rather have them firing at different targets.