Battle Sisters help
Very new to the game, first time posting even, but as I laborously begin to delve into the rules, army lists, paint, sickly green putty, and models, I'm really enjoying it in a 'learning something awesome' sort of way.
My question on tactics comes when designing a potential armylist. Most notably, the basic Troop choice and if 'filling' a squad is the most beneficial way to do it over, say, multiple smaller ones.
An example would be:
A. Three Squads of: 9 Battle Sisters w/ Heavy Flamer, Meltagun +1 Veteran w/ Book of St. Lucius
B. One Squad of: 19 Battle Sisters w/ Heavy Flamer, Meltagun +1 Veteran w/ Book of St. Lucius || and One Squad of 10 like in A.
Obviously the point costs are off, but you get my meaning. Multiple 10sister squads yeilds more Faith Points, gives me more opportunities to capture things (I think), and makes rolling over the number of sisters in a squad for certain acts of faith easier (but rolling under harder). It is more expensive, though, since it's that many more veterans and special guns. I could mount the little ones on rhinos which is a plus, but a tinier squad dies easier too.
Is this supposed to be a somewhat back and forth decision or is there accepted truths about unit sizes? I'm certain there are things I'm not taking into account seeing how new I am to the game, and I imagine it might also depend on points of the army (1500) and opponents too, but gimmie your wisdom regardless!