This isn’t an alliance, but it’s something the alliances can help with. User locked just tracked down Magneto’s power.
If your Alliance has all the max builds of a particular maxed character, say level 141 Psylocke, with levels 3, 4, and 5 for all powers, then go to the Character forum for that character and mention your Alliance and the members of that alliance that have each build. Then, give any stats that aren’t mentioned in the Compendium for how the different levels work.
Post interesting findings to Secret/Undocumented Cover Bonuses.
Feel free to post Alliance claims to a particular character here.