I like the idea of “starting with speed.” It helps to know what you can do fast, what motion works for you at “top end” (-whatever that may be at the moment).
In my case, I have that. I know exactly what it is and how to do it. It’s the fastest way for me to sustain tremolo picking. Further, it’s something I don’t have to warm up to get. It’s always there. (Or seems to be.)
As you can see, this grip is a little unusual. It feels like skating on a string rather than picking it. The motion is from the wrist, very easy to do and to keep doing for a while.
As good as this is for tremolo picking, it’s not the best thing for, well, regular picking: playing a song with rhythm parts, a riff, a solo that isn’t shred-y, or just playing things to warm up with. I don’t NEED to warm up for this, it’s just the speed of my wrist (I guess.)
I’m putting this out because I thought if I could play fast, I could play anything else. Turns out playing fast (at least in this way) is easy, but it doesn’t make anything else easy.