Who is the top Telepath? the best telepath there is in the X-books?

[ExodusCloak]

Emma didn’t do that on her own, she needed the Cuckoos to boost her because she doesn’t have mass global reach. Also which is more difficult, speaking to a ton of people simultaneously or listening to a ton of people simultaneously?

Rogue absorbed their psyches, which only still existed because the Hecatomb failed processing them after the first 10 million souls, but Emma wasn’t digging down through billions of thoughts and memories for information like Rachel, she only needed to brush the surface and find Rogue. And she wasn’t even necessairily in contact with them all simultaneously either, we don’t know how many she went through even before finding Rogue relatively quick. When you look for a single grain of sand in a desert, which was the comparison Emma gave, you’re looking at every piece of sand at once.

False, the Cuckoo's werent there in that scan. The one in Utopia
Rachel wasn't listening to them similtaneously. She was sitting up there counting. WATXM doesn't state that she was doing that. Additionally, she took her time to do that. Emma did it in a few panels.

Rogue absorbed their minds. Again I urge you to actually read the arc. The shiar developed a weapon to separate mind from body. And the problem with the virus meant that rogue was killing people with her touch as she was able to absorb the entire mind.

Rachel clearly wasn't digging well enough either because she couldn't locate the Hellfire Club and there were many that knew information on it. Including the inner circle and the Cordelia Frost apparently