死灵书: the high attack speed of the summons will often trigger the slow, it can be combined with the purge ability of the archer to slow your ennemy even more. It counters invisible heroes.
疯狂面具: the silence from the Nullifier will protect you from being disabled and the movement slow synergize with the bonus attack and movement speed. The Nullifier will grant you armor and damage that your Mask of Madness will benefit.