Hi A!

1. That depends on how close you are with them and what interaction you've had with them. If you have only reached out on through linkedin messages, I doubt that they will refer you based on that. It is probably just forwarding the contact. If you had actual conversations with them and they know you a bit, then potentially yes.
2. No, multiple referrals will not increase your chances. A referral (combined with a reasonably strong background) gets you an interview. After that you're on your own.

Regards!

One is enough. If one of them leads recruiting for your cohort (e.g., experienced hire recruiting) for that office then that would be my first choice. I personally don't think seniority matters as much.

1 is more than enough. If I had to pick I would pick the senior most partner. The other thing to do is to ask the other partners to reach out to HR to say that they had spoken to you and liked your background that way HR will move quickly to get you an interview.

Udayan

Hi, I confirm only 1 referral is enough to achieve the accelerated process. I would talk about it with HR to clarify if it counts as a referral. In negative case I would try with more junior roles (even associates can guarantee a referral)

Best,
Antonello