4-string sweeps are realy hard to find in anybody's music (donno why) , except for Friedman ... "Rust in Peace" album is full of 4-string sweeps .
For the 2-string sweep , most people call it economy picking ... I don't care anyway , both have the same theory & goal which is less movement for sure.
Rising force solo is cool , specialy the octave switching part ... It seems like the one at the end of Crossroads duel , realy cool to show off ! :D