I'm pretty much just satisfied with having one save file in each of my amiibo, particularly with Smash since it takes about 2 hours each to get them to level 50. Ever since I started getting them, I've always treated them like Super Smash Bros. trophies in real life. That's why my collection is set up starting from the original 12, to Melee vets, to Brawl vets, to Smash 4 newcomers. After that it's non-Smash characters. I avoid collecting variants of characters if it's either just in a different line-up or in a different color. Good thing they're not nearly as expensive as they used to be. Still trying to be strategic when buying new ones though. Last one I snagged was Ryu for $12 even. Roy is still in stock, so I'll probably get him soon. Robin and Lucina are about $17 on ebay now, but I'm still waiting for a potential restock.
Although I have Rosalina after going through great lengths to import her last year, I'm still pretty baffled on how she never had an American restock in any way, shape, or form after Target had their only supply for about 30 minutes. Her Super Mario variant should satisfy those who still need her, but seeing the Smash one return would be nice too.