I am a beginner/ intermediate guitar player and today I started to learn how to play Seek and Destroy from Metallica, as shown in this tablature
Parallel to that I have been learning scales (major scale mostly) and I have been heavily focusing on alternate picking, which to me, it is an important technique to master for faster solos/ leads. And while alternate picking at not super high-speed in a scale does feel natural to me already, I feel it is less natural to me while playing seek an destroy.
Other than that, I have seen one or two tutorials on how to play seek and destroy. And I saw examples of both strict alternate picking like this one and other tutorials where mostly down-picking is used, like this one
I know that in guitar there is no right or wrong. Though one thing important to me is to stick to the 'most appropriate' technique since the beginning i.e. avoid developing a bad habit. I do know how to alternate pick and I would say in most of the occasions it is the most natural thing to do, but that's is not the case while playing this song.
For the sake of clarity, I am talking about alternate picking when moving from one string to another (considering down-picking only for strokes in the same string), for example, in the intro below:
Considering now the last part:
Would it best to alternate pick (is this the most appropriate technique? For me it is somewhat less natural) or is it totally acceptable to down pick only.
Same for the first riff:
When moving from the A to the E string i.e.:
Would it be best to DDUD (D: Down stroke, U: Upstroke) or if I down pick only (DDDD) is it also acceptable (perhaps better?)?