Recall that voting would be by list at any rate. This would decrease zombie effects.
It might be interesting to have a Senate based on the Northern Irish model.
What's the Northern Irish model? I was thinking like the Victorian (Australian) model would be a possible way of ensuring minority representation through PR, but not letting the numbers drop to insignificant 4% levels (50 Senators all off the one ballot).
I oppose running elections like in Atlasia, since that encourages stupid players, zombies and sh**t in general.
I wholeheartedly endorse this opinion.