Nightfall
Sage of the Scarred Lands
Think you'll find that you don't have to worry too much about using the templates to "tweak" some NPCs. Certainly I didn't see any problems with Fatlings, Hags or Unhallowed.
Tweg,
I think you're missing out on the best aspects of the book since much of what was done not only to the CRs but the skill points and feats are better done.
Otu,
For using Hag Template on Piscian, I'd say they would go one size larger. But only because they are big. As for a Halfling Fatling, they would increase to Huge, primarily because Fatling are THAT damn big. Piscans probably wouldn't be able to survive the change into a Fatling mainly because they'd still be aquatic. But if you wanted to do that way, I'd say they would go one size larger than normal.
Tweg,
I think you're missing out on the best aspects of the book since much of what was done not only to the CRs but the skill points and feats are better done.
Otu,
For using Hag Template on Piscian, I'd say they would go one size larger. But only because they are big. As for a Halfling Fatling, they would increase to Huge, primarily because Fatling are THAT damn big. Piscans probably wouldn't be able to survive the change into a Fatling mainly because they'd still be aquatic. But if you wanted to do that way, I'd say they would go one size larger than normal.