Conversation so far:
what powers does drusilla have?
Drusilla has all the standard powers and vulnerabilities of a vampire, plus minor psychic abilities.
what are the powers of a vampire?
She is immortal, regenerates damage, drains human blood to survive, and is stronger than most humans.
what other abilities does she have?
Drusilla's technique in combat, although awkward-looking, has allowed her to briefly hold her own in a fight against Angel (in "Reunion") and Spike (in "Becoming, Part Two").

Question: what technique did she use?
Self-contained rewrite: What technique did Drusilla from Buffy the Vampire Slayer use in her fight against Angel and Spike?