I could not find your marespedigree so not knowing her lines, it would be tough to guess on who is gaiting largo in her pedigree and what colors are in her background if you wanted to do some linebreeding. Do you have the direct URL to it?
Your mare probably will throw black or bay foals morethan likely no matter who she is bred to just given her pretty color! But that is just a guess!
Breeding for buckskins can be tricky...and more so in the Paso Fino breed.
For the prettiest colored buckskins they say to breed bloodbays to golden buckskin. It throws the rich golden copper. And look for dun factor if you are wanting the dorsal stripes, leg barrs and such.
There are also champaign colors with black points.
The Paso Fino has an array of colors not common in other breeds...many many shades! Gene pools are unusual in this breed and some can be off the wall on what is typical in color genetics.
It would depend on who is also in your area and budget!
I'm and old traditionalist. the horses in the Paso Showring today are a bit different from what I started with and I no longer show. The standards have changed and depending on what you are tryign to accomplish in your breeding program, that is what you hve to decide what you want to go for!!
Since the breed is gait based, that is what I look for first and not color.
My seal bay Paso Fino stallion will throw blood bay, solid black, or a lighter bay when bred to bays or blacks and liver chestnuts. He has not duplicated his own color which is like your mare! LOL!
Good luck with no matter what you do with her!! She is beautiful!
