Conversation so far:
what sort of powers did Drusilla have?
Drusilla has all the standard powers and vulnerabilities of a vampire, plus minor psychic abilities.
What  do her abilities allow her to see?
She receives vivid visions that contain possible glimpses of the future, and can also see into people's minds and project false imagery into them .
do her powers help her hunt vampires?
CANNOTANSWER.
what are her powers used for?
It was also in this fight with Kendra that Drusilla showed that her fingernails are sharper than one would normally expect, as she uses them to slit Kendra's throat.
Are there other ways she can slay them?
She is also capable of hypnotizing people, which she does by catching their gazes, pointing her fingers towards her victim's eyes and then to her own, whispering to them.

Question: Does she use her abilities for good or evil?
Self-contained rewrite: Does Drusilla on Buffy the Vampire Slayer use her abilities for good or evil?