Do voting ratios matter?

My paranoia assumes Reddit monitors upvotes & downvotes for patterns. When Reddit sees the same 10 accounts upvoting or downvoting the same content, it can be flagged as a network and banned.

So if I want to be able to upvote or downvote content, my paranoid mind assumes I need to mix in random votes for different content let's say 90% random voting & 10% directed voting. So each account votes on 9 random things between each time it votes for my content.

To further avoid being seen as a voting network, never use more than 20% of my network at once. So if I want to give 10 upvotes to a post, I randomly pick from my 50 accounts (with different browser fingerprints, ip, email, 2fa). Also, assuming all 50 accounts were slowly warmed up when created, are now months old, and used regularly each week to avoid becoming stale.

Am I overthinking things? Am I overlooking anything?

I think you're overthinking it a bit. If you're coordinating votes across your own accounts, that's the part Reddit cares about. I wouldn't assume adding random votes in between is going to make much of a difference.

Maybe you’re worrying about mechanics a little too much. The way things work on Reddit focuses on user behavior and authenticity rather than on vote ratios alone. Creating genuine engagement and not doing anything coordinated is a better bet than engineering something around it.