Crash a pserver?

Can anyone give me a list of ideas or something on how to crash a server?
Trying to find out ways so I can try patch it as the server seems to be crashing a lot and I don't know how or why.

trickster+infinite mana+no cooldown = crashed
wizard+infinite mana+no cooldown looks pretty nice if you spam it for 10 seconds straight, but I don't know if it can crash a server

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btw this should go in pserver help right? @Luverdark @Nyaro