I know the chicken biryani is 3.5 syns for the whole sachet as i picked it up from tesco the other night. The whole sachet serves four so its a winner.
Im a BIG fan of the schwartz packet mixes. They serve 4 so the syn values are minimal. I like them because you dont need many ingredients on top and it seems inexpensive when the supermarkets have them on offer. Whats more i love it that i can just bung it all in the slow cooker all day