Hmmm...
A couple of suggestions - and yes, I've no SH3 modding knowledge whatsoever so if I'm being more of a hindrance than help here then please say so and I'll STFU straight away!
But anyway here goes while I'm still welcomed
1) How about making a wrapper of some kind that just runs the effects sequentially so that they're not actually connected to each other?
2) How about somehow introducing a small delay between the effects?
PS. Rgt Graf.