I think the best way is a mix. While i prefer manual curation and a couple of years ago i had a lot of free time that i invested in the platform reading and upvoting nowadays i am here like 30 minutes and on certain days.
Thus, i decided that when i got some more free time i read, comment and upvote manually, but i used autovotes to some of the people i really like their posts, as i wanted them to keep earning my 1-2 cents of motivation :P to keep on creating!