I’m trying to play a six-note pattern such as Troy demonstrates in one of his videos, and it is not very do-able, least I struggle with it.
If you are tremolo picking on an open string, it is easier because there is less string tension. But as soon as you start fretting notes, the string gives you more resistance making picking fast even more difficult because there is more string tension, and it’s so easy for the pick to get caught on the string usually on the upstroke.
Also if you are going slowly it is easier. If you go fast it is more likely you will get caught on the string.
There are some times where I can nail it pretty good, but I am not consistent at all.
If I was using a thin pick it might be easier because the pick will flex more and allow me to get through the string easier.