property tool can set the position(x and y), which is harder due to particle order but works, and there is subframe chipmaker script(in lua script manager, search it up if you don't have), which lags the game with enough particles but you can disable and can be used to layer stuff much easier
GALLIFREYSTANDS: Mods are the easiest way, but there are other ways as well within the actual game without mods.
I think you should use more layers to your bomb