Have you had a look at the GigaRageBuff, in the content browser just search for “Buff” and it will be in the list. Look at it’s code, It has a call for:
Is Server (if yes manipulate stats and counter)
Is Dedicated (now I think it’s true clause is absent, but if it’s false (not server, and not dedicated server) render particle effects (since it would be clientside))
you might be able to tack on the is dedicated and have the true clause lead to the start of your main code
Event Fires:
IsServer:
Yes, start code
No, IsDedicated:
Yes, start code
No, nothing.
Not sure if that will help or is the solution as I have not released my own mod publicly as it needs balance changes yet, and it’s always single-player Hosted (not dedicated) when I run it.