Squier Strat and Frontman 15W amp? Exactly what I started out with when I joined GN about 8 years ago! I was particularly keen on saving my settings back then....had a book with every setting written down in it. The killer word there is "had"...as in, "I wonder what happened to......?" unfortunately.
From memory, I used to keep the gain down to about 4 when playing blues - like you, I needed very little volume on the amp. I tended to keep the volume switched up on the guitar though, round about 8 or 9 - advice from these very forums, you might want to turn it up a little for solos.
Not a bad little amp, the Frontman....had mine for a couple of years or so then got a Cube 15. Again, from memory, the only thing missing from the Frontman is reverb or echo, the Cube has both.
"Sometimes the beauty of music can help us all find strength to deal with all the curves life can throw us." (D. Hodge.)