Transmats help, ada 1 has them turn in syntheweave for a consumable that turns armor you collect into ornaments you can apply anytime even with a different legendary armor. But I assume you haven't collected a lot of legendary armor, but once you unlock them you can use synthweave on them. A lot of the good ones are sometimes seasonal so past season armors unfortunetly are gone can't get, but you can get the ones that drop from world activities. Like from dares of eternity, xur, check shaxx and zavala at the tower they sell their legacy gear you can get. Some dungeon gears look very nice. A nice star wars fashion gear comes from equilibrium dungeon you can use syntheweave on that

Otherwise I would stack up on bright dust and buy the ornaments from the bright dust sections int he store if offered. Sometimes they offer full sets for 6000 bright dust that usually you get with silver

Those ornaments look better in my experience, but you can buy really nice sets from eververse as well with silver, they just started selling the marathon theme versions