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[Fantastic Four] Why is Invisible Woman considered the strongest member of the team?

Just started reading the new X-Men/FF crossover, and they call Sue one of the most powerful women on the planet. Surprised by this, since I don't know much about the team beyond the basics, I did some research that confirmed this, in addition to identifying her as the strongest member of the team. 

Why is this? Maybe I don't understand her powerset well enough, but isn't she basically just a telekinetic with extra steps (and plus invisibility, I guess). I can't see, from reading a variety of wikis, anything that suggests she's more powerful than Jean Grey or Storm, for example, let alone one of the most powerful women on the planet. 

"Most powerful member of the team" makes a little more sense, I guess, since the other three have... fairly straightforward (or even unimpressive) powers. But everything I read suggests she's MUCH more powerful than them.

Just looking to understand better. 

Thanks!
gpt
It is hard to explain but let me try... in a way she is a little bit like an invisible Green Lantern. It is not just telekinesis but she creates bubbles or causes impact with her invisible fields. She can hypothetically do things that are incredibly precise, or massive feats of invisible strength. 

To say she is the strongest FF member feels consistent with her power set for sure. She is also somebody who has had time to grow into her powers, from feeling invisible among big egos with big powers to leaping past them and becoming their protector.