Ulthwe bonus is a 6+ FNP to everything.
That means that aside from units that already have one, that it doesn't work with (Farseer, Avatar, any Vehicle with Spirit Stones), essentially gets 16% more wounds. More survive, more stay on the field.
Biel-Tan gives something like 20% increase in outgoing shots on Shuriken weapons, which is great if you have the Shuriken Cannon spam and Dire Avengers.
Alaitoc has -1 to hit beyond 12"
Is Alaitoc, mathematically, equivalent to Ulthwe in terms of being 16% more survive, more stay on the field, but only from ranged weapons beyond 12"?
I'm thinking about the total wounds given as Hits * Wounds * Saves * FNP rolls, where it's all commutitive, mathematically, so it doesn't matter if you increase the Wounds by 16%, or the FNP rolls by 16%, it doesn't matter, it's just 1/6th better one way or the other.
Am I wrong? What's going on? Why are people saying that Alaitoc is so good or that Ulthwe is so bad?