when i use this at ZG farm i have big lags at killing phase

Sorry for the late reply. These issues are a bit tricky to debug. There have been reports of slowdown inside raids before, which can be related to the large amount of combat log data being generated there. Do any errors occur during the slowdowns? (You can install BugSack or a similar tool to more accurately catch errors)

Otherwise, it may be a general performance issue and I'm unsure when I'll have time to look at it.

Does the lag occur as big "spikes" (so it's smooth in-between those) or is it a more consistent type of lag?

Closing due to inactivity, feel free to re-open if still relevant. Since the issue creation there have been some updates to address general performance, so it's possible the issue has been fixed with those changes.