This is what Taelia actually did. At least I gained an extra 3 points with (I took away white territory, captured a white stone, and gained black territory). Unfortunately, I also lost Sente.
Here, I hardly would have gained anything with . The only slight advantage I have is that fills in White's territory.
MrTenuki: It seems to me that Black has more to gain by first playing a and then trying to reduce White's right side...