Hello Dave,
Thanks For the answer.
Regarding the max link juice - in my industry top listings are having more than 100 links on site, and we didn't changes the site architecture since a year.
We got top positions with this site architecture. however i am changing the site architecture, but it will not give a sure stable rankings. I am looking for the stable rankings, plus I am not punished in panda rollout, as i checked my backlinks regularly.
One more thing to add, we are getting this kind of penalities or rankng fall down before panda update..
Thanks for the referal traffic point.