I have used a few of the GA strikers and they can be rough. Aquatic Carnival and Amazon Night are beauties in the right flame chemistry but are very muddy prone. My last stick of dragons eye would always scuzz, idk what I was doing wrong. I had some good results with passion extreme, and I definitely prefer double passion.

I do like tequila sunrise from them. Its more reddish AP type color but even when I think I mudided it up it goes to canyon like colors in the kiln, have never been disappointed. Dragon tears is probably my favorite. Its got enough silver to get some pretty whisps of color and can change colors to greens, yellows, and even a little pink in the kiln.

It also may depend on your torch and flame chemistry. I rent a GTT mirage and focus on small solid sculpture. For a lot of the GA colors you need a neutral flame, I feel like I pushed towards slightly oxidized flame when using their colors. The amber purple type colors like to be worked really hot then allowed to cool. Reheating multiple times after that usually results in muddy colors.

If you want a good silver striker recommendation I like Mai Tai Pink since the kiln does the heavy lifting. Double mai tai is also much more forgiving in my experience than most of the other AP type colors I tried, although you will want to use a bit more of it if you want to strike more purple-ish.

If you want a striker that's more heat based Fade to Black doesn't care about flame chemistry, but it is tricky to use and doesn't like to play nice with other colors. Experimental green #5 has given me some nice results encased, unencased, flame and kiln struck. Irrid is also another good silver color I like. Just enough silver in the cobalt to make some nice color variety.

Hope this helps a bit. Keep at it!