It seems one person suggested that Graendal's comment about Someryn not being negligible was an indication that Someryn approached Graendal herself in strength, and now suddenly everyone has jumped onto that band wagon.

The truth is that the general impression has always been that Someryn might be somewhere between Egwene's level and Forsaken level - perhaps even as strong as Moghedien.

There is no proof that she is any stronger than that. Graendal merely said she was "not negligible", if I recall correctly, and that she would not risk strength and skill residing together.

I highly doubt that Graendal would consider Moghedien negligible either.

Personally, I am comfortable in placing Someryn at Moghedien's level. I certainly did not interpret Graendal's comment as indicating that Someryn came close to equaling herself in strength.

I don't think Someryn exceeds Nynaeve.