Spawn Particle Bursts Together

I’m currently trying to achieve a very simple rain splash effect. For this purpose I have set up 2 emitters. One for the rain and the other one for the water splashes.

I’d like those splashes to be particle bursts (3-8 particles each), looping, and randomly distributed over a 2000 by 2000 plane using Initial Location. Unreal seems to be setting each particles location independently (which makes sense), is there an option to force the random initial location to spawn particles of the same burst together.

I’m just starting with Particles, so I might very well be using the wrong technique. I am open to any suggestion of better ways to achieve this rain splash effect. (I’m using GPU particles for the rain, so unfortunately, event casting is out the window from what I’ve gathered so far).