This Scan has always impressed me. Here they start that an Xteam comprising of Cyclops
Rogue
Jean grey
Beast
Bishop
Is strong enough to take out 1000 Shiar Warriors. I like that the X-men have a reputation like this outside the planet.
Post similar scans you can find, like Red skull with Xavier powers or Exodus commenting that all the Xmen have formidable mental defenses from Xaviers training. Or scenes of enemies losing their Sith or fleeing when they hear that the X-men have arrived.
You can post scans for single Xmen, like Shield talking about Cyclops tactical ability or Wolverine/Gambits combat ability or some of the X-telepaths being ranked among the top 5/10 Telepaths by someone of note.
Let's see how much Rep the Xmen have built up after all this years .