I finally got a Z-class character (Xena), but it wasn't the one I wanted. She does have Levitation though (super helpful, if the original TB is any indication), as well as Treasure Hunter (should help with farming). She's a bow unit too, which there seems to be a rarity of so far.
Along with her, I only got one other SS character, that being Zumbra (looks to be a mixed attacker). I also have 3x S-class characters along with it, as well as 5x A-class. One of the A-class is a healer (Tuttra), so hopefully he'll be able to carry me until I pull something better. I have a nice mix of types (melee/ranged/magic) and a healer, so I might stick with this.