I made some maps for playing Sins within my guilld, with the intention of making the most balanced maps possible for 3v3, 4v4, 5v5, 2v2v2 and 3v3v3. I also made 5v3 and 7v3 for comp stomps. Each map has a balanced and randomized version.
Thought I'd share them since we've had some really good games using them.
Some screenshots from GalaxyForge:
The others all stick to this basic pattern where each player has their own little collection of planets, and the teams eventually converge in the center (or through the wormholes).