Yeah, we killed the elevator instantly.
It's still crazy lagged. At one point it got stuck in a loop I'm assuming doing the ground pound hammer. One player got stuck in a loop with nausea and explosions. We killed the scoreboard item "mallet" and it stopped. When that was happening the server would eventually crash after a few minutes.
We've tried additional ram, at this point it's CPU limited (v3 Xeon with plenty of horse power). We've given the jvm 16gb of ram and it still lags like crazy.