Sweep-tapping (ending the highest note of a sweep with a tap with the fretting hand, then another up a third or so with the picking hand before dragging the pick up the other way, that stuff is all over the very early Fragmenta stuff) huge, scrunchy, palm muted power chords with double stacked 5ths and octaves, hitting a tapped harmonic up from a fretted pre-bend and releasing. I occasionally spice up my powerchords in my band by adding minor and major 7ths for tension.
When I play chuggy, thrash riffs, I omit the root and just use the 5th and octave for the ‘chord’, pedaling back and forth between that and the chugged root.
Now that we’re a four-piece again, when the guitars aren’t doing harmonies, I love to have the other guitarist double the higher power chords (which I would play on the A, D and G strings) by ditching the octave and playing it down low with inverted 4ths (on the E, A and D strings).
I love flamenco style clean playing like at 2:39. It’s a lot harder than it sounds without flamenco chops.