Artemicion said:
Hauberk +1 would give greater consistency while TPing, and assuming accuracy isn't an issue, Perle still makes a worthy WS piece until you get something better. The only exception here would be if you rely on full perle to gain your haste bonus. However, since BST can use kitty pants, this shouldn't be an issue.
These are nice too, +2 if possible. Pretty easy for BST to hit the haste cap now without full Perle.