Steelheart, I don't know what your dimensions are, but I use a 25g 1 inch for everything: delts and glutes. I have yet to to quad shots, or other ones. If you have a big ass, you might want the 1.5 incher.
Delts can be done with 5/8, but I would not do glutes with that. I also would NOT recommend doing delts with a 1.5 incher, that would go too deep. Also quads should be able to use 5/8, but you might want to go with the 1 incher to make sure it gets down in the muscle.
And yes, you can use insulin pins with fina. And if you are doing it every day, these start to look good. I just got myself some, although the needle is not as long as I would like. I will be limited to delts only with it.