I don't understand these posts. They basically turn into a "how much ya bench?" where the answer determines deadliness in a one power struggle.

Graendal is probably very fast and skilled with the one power. She is also very strong. If she is indeed so much smarter than the others, then her deadliness in a OP duel may be greater than theirs (for all we know). She survived Rand by not taking stupid chances. She didn't stand there like arangar wondering why Rand was holding so much power. She acted so fast that she escaped with her skin intact and killed Arangar and Delana in the process.

I am not even a Graendal fan, but I have to acknowledge that for all we know her set of skills (intelligence, power, dexterity) might make her the most dangerous of all. We really just don't know very much. She could be first, she could be last.

You are probably right that she couldn't get into a OP arm wrestle with Rand or Lanfear. But if a real fight broke out wherein a single move will can kill any unwary opponent regardless of strength, I wouldn't bet against Graendal.