I tried a very, very simple build yesterday for the first time:
Ketsu: VI, Dengar, Title and engine upgrade
4 x Z-95
(97 point bid)
One tractor beam token makes another player wary of those Z-95... two makes them very, very serious threats... and when you also managed to push the offending ship on an asteroid, then that can really ruin your opponent's day.
I found it interesting that my opponent had to deal with my Z-95s instead of focusing on Ketsu because suddenly, these guys became competitive!