What I have found when leveling my coach is the more contact points you have with the ground results in a more stable coach.
So, 10 points of contact (4 jacks, 6 Tires) help to stabilize and reduce rocking, etc.
In a very out of level camp spot, I use blocks to get the vehicle mostly level then use the jacks to essentially take the weight off of the suspension to create a level condition. Seems to work for me.
I have lifted the front end pretty far off of the ground before and I don't like to see the suspension just hanging on for dear life completely stressing the system. That's just me though and I'm sure someone will have a comment about that.
Good luck.