You need kulen.
How can you have any pudding?
Hyperspace Drives seem overpowered using Drive Power Movement? There is no defense other than to never split up your ships and hope that is enough.
In my experience they are not overpowered. It gives the Han-Xia some early game power, and they absolutely have to use it, because their end game is shitty.
If they do not rack up enough points until the point where everyone is moving massive fleets, they will not be able to do anything.
The only faction that can easily move and expand when Han-Xia have such setups are Solaris, rest should group up, which allows Han-Xia to try and expand as much as they can before the rest overpower them.
Han-Xia and Solaris are the main limiting factor (one with ships, one with WMD) on the Titan-Diarchy powerhouse, I found that if players playing these two factions are not aggressive enough, Titan will have a runaway victory. All they need is 2 or 3 CP planets.