Landking and Handking is what some call “welfare” gear. Its a decent stepping stone, but you cant meld it, and the stats are below what you can get with the HQ crafted. Onishi gear is the best gear out atm, but it takes awhile to get if you’re crafting it from scratch. Furthermore if you have no crafter gear atm then it will be next to impossible to craft it yourself (Unless you go with Maker’s Mark/Whistle rotations).
Go to the MB and search for level appropiate gear, you’ll see the Onishi gear listed at the top. I wouldnt worry about Ornate. Its basically the same, but with extra Materia slots.