Third Romatiklan, by a wide margin, assuming Keevan doesn't count.
Rocks and Shoals
is one of my favorite episodes.
I also like Mareel in Invasive Procedures
. She beat up Kira - who attacked her
- without breaking a sweat, and rubbed it in a couple scenes later by asking her "are you ok?" in a mock-caring, motherly tone upon seeing Kira try to walk across the room with obviously sore ribs.