Alchemist's policy is we have 2 slots for dedicated coaches in the program. As you also know, you'll have 1-2 Partners that will also be mapped to you and have office hours.
You have the ability to meet with other mentors for 1-2 meetings during the program without needing to formalize someone as a coach.
If you do want to add additional coaches, you can but there's an additional Alchemist common stock equity ask of 0.5% equity for each additional coach.