What do you recommend for the hill group. I've seen a few suggestions. I've seen send all DPS down and 2 heal the hill. I've also seen 3 heals and 3 DPS so you can predict foul stream. Finally I've also seen 3 heals and 2 DPS. What are the pros and cons. I've also seen videos where the tombs only target the healers. Is there a way to control who tombs spawn on?