Yes. Two Wicked Winds combine to deal 3200%. However, after that the reduced damage of the Wicked Wind rune starts to come into effect.
Per Lexyu’s testing, the first two combined give 3200%, but then the additional ones that combine after that give Wicked Wind damage (so an additional 835% per each additional twisters 3-5, if I’m understanding it right).
Not sure. Felt like the damage ramped up quite a bit after 1 second to me, but that could just be from the combined twisters + additional Twisted Sword stack.
It doesn’t pull elites, bosses, RGs, or larger enemies (e.g. golgors). It should pull all small and medium size enemies.