Some notes for using these mods:

Set pieces are capped, so if you have many set piece spawning mods, you are unlikely to get every single one in every single world you spawn.

You can increase your chances by setting set pieces/boons to "lots", setting map size to "huge" in the world configuration screen, and choosing a "default plus" start (gives you tougher set pieces).

Sometimes you will get double set pieces, because the game spawns a copy and this mod spawns a copy.