RE: What's the easiest drawing type of cam?
You want a SMOOTH draw? Get an Oneida. Say what you will about Oneidas, but my 10 year old Phantom II is smoother than the new Bowtech Liberty. Plus with an Oneida, you can shoot 67 pounds and it will only feel like 55, because of the lever design. Oh, and did I mention never having to go to the shop just change a string or adjust timing? With an Oneida you can completely disassemble and reassemble the entire bow with a bow press. In fact, Never put an Oneida in a regular bow press. So to answer your question, Oneida.
PS: Like the dude above me said, If your still worried about penetration get Magnus Stingers. They are the best broadhead IMO. and With a warrenty like they have, I dont see why wouldnt get them. You can shoot them into a vault door and send them back, and tell them you shot it into a vault door, and they will send you new ones.