For what it's worth...
I'm not Jeremy, so please take this for what it's worth...(which some would probably say nothing! ;) )
My understanding of suspension tuning is that you want your suspension to bottom on the harshest part of the track. However, you NEVER want your suspension to harshly bottom. For example, if the double you are talking about is the harshest jump on the track then you want your suspension to bottom, or come close to bottoming out, while negotiating it. That way you are getting the full travel of your suspension throughtout the whole track.
Also, as I understand suspension tuning, you want your overall ride to be plush, rather than hard. However, you don't want it too plush. Tuning your suspension is apparently something that you have to do for each track you ride in addition to when the conditions change. I can tell you that I don't do that...I've just got my suspension setup to where I like it and I don't think I want to muck with it much more.
In any case, hopefully Jeremy will respond and give you a better answer. I just felt inclined to throw in my 2 cents.
Good luck.