I don't buy anything else.

I get the pack of 36 off Amazon.
https://www.amazon.com/Dunlop-Black-James-Hetfield-Guitar/dp/B00498CQTC

Though I want to try out James' new White Fang picks that he's been using lately. https://www.reddit.com/r/Metallica/comments/9o0ekg/james_threw_3_picks_off_his_mic_stand_at_the_end/