Stardust dragon or 1 each of the new dragunity knights?

ok so im definitely going to order a five headed dragon and imperial iron wall but i cant decide weather to get stardust dragon or 1 each of dragunity knight trident and barcha. now don't say get all 3 cause i can im ordering from troll and toad so i can either order a stardust or 1 each of the new dragunity knights wich should i go with.