Definitely alt. picking if you can. Zakk Wylde is a fan of playing everything precisely picked, and to not miss a note while doing it. He straid away from legato cuz he liked the sound of picking better, plus he uses a lot of legato when playing the stuff that randy did...
There are only two important things in life - There's music and theres girls, not necessarily in that order....
The Ace's Guitar Tricks