TFoH
The Threads Burn

"Why will you not understand what I tell you? Even if they had only dreamed themselves here, either would be stronger than we. Here in the flesh, they could crush us without blinking. In the flesh they can draw saidin more deeply than we can draw saidar dreaming."

"We are linked." Still not paying attention, Nynaeve gave her braid a sharp pull. No way to tell which direction they had gone. And no warning of anything until she saw them. Somehow it still seemed unfair that they could channel without her being able to see or feel the flows. A stand-lamp that had been sliced in two was suddenly whole again, then not, just as quickly. That white fire must be incredibly powerful. Tel'aran'rhiod usually healed itself rapidly whatever you did to it.

"You brainless fool," Moghedien sobbed, shaking Nynaeve's skirt with both hands as if wanting to shake Nynaeve. "It does not matter how brave you are. We are linked, but you contribute nothing the way you are. Not a shred. It is my strength, and your madness. They are here in the flesh, not dreaming! They are using things you have never dreamed of! They will destroy us if we stay!"

It's not all about strength... unquestionably the men are stronger. But it's compounded because the women are 1. There in dream state and thus even more disadvantaged in strength (as you'll note Moghedien points out). 2. Nynaeve is vastly less skilled than Rhavin, who "is using things you have never dreamed of" ... of course Nyna would get her ass handed to her in a direct confrontation!

As for Elayne and Egwene being "more advanced" ... again, Rand is already stronger than most Forsaken men at this point in the book since he went toe to toe with Aginor and Ishamael even earlier ... clearly he has gain much more of his ultimate strength by this point than either of these women!

I agree that Rand is probably 2x (or thereabouts) stronger than Egwene/Elayne, but we also know from RJ that "there are several levels of Male strength above female strength" ... which means Lanfear may be 70-75% of Rand, but is effectively equal to him. Whereas Elayne would be closer to 50-60% of his raw strength (thus more like 80% of Lanfear.