As long as they attack her the same way they attacked him then she should be fine. They mostly only attack Sunny in two's and three's. The few times they attack him with more people they usually attack from one direction so it's easy to block.
I mean, it's still a good high-end feat, just that I think Elektra is perfectly capable of doing the same provided the opponents behave the same.
At around the 1:30 mark he is fighting them 6-on-1, from all directions.
I also think she could clear, but not with the same speed and efficiency as Sunny. He edges her out in swordsmanship IMO. I have a really tough time seeing a one-handed Stick outmaneuvering Sunny in swordplay.
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