Finding various ways to play these scales will help you. Sticking to box pattern scales will sound good, but again, if you’re sticking to pentatonic box shapes, you’ll sound a little like Angus Young, or Toni Iommi… which isn’t bad, just not "metal" I guess… or at least, not the type of metal you’re looking to play. Box patterns will eventually become boring, which is a good thing, because after this happens, they become second nature to your playing. The trick, is to know other techniques to get you away from them from time to time.

3 things you should also get familiar with.
- Chromatic exercises, and utilizing them in solo’s.
- grouping (groups of 3, 4, 5 and 6); grouping your scales together to form super long sounding runs will spice up your metal solo’s, especially when you learn the 3 octave method for scales, which has you travel up or down the fretboard, covering 3 full octaves. This gets you out of the box patterns a little bit, or at least will allow you to move up or down from one pattern to another.
- Arpeggios. Learn them. Love them. Use them.

The rest seem to be a lot of string bends, Pinch harmonics and excessive use of legato… which all classify more as a technique than anything else…. so you should be using these techniques in your solo’s too when you’re playing through the scale/arpeggios.