1)
What are Rakachos?
1.
Rashi: They make cosmetic fragrances for the king's women.
2.
Radak citing Targum Yonasan: Leshamshan (R. Avraham ben Shlomo - to compound spices for cooking).
3.
Malbim: This is an adjective; they are enslaved Shifchos.
2)
What will the Tabachos do?
1.
Radak #1: They cook. In Arabic, a chef is called Tabach.
2.
Radak #2: They slaughter. The cooks slaughter the animals that they cook.