What's Better for Gaining Karma: Commenting or Posting

I’m trying to build up my Reddit karma and was wondering—what’s the better strategy: commenting a lot or making posts?

From what I’ve seen, some posts can blow up and get thousands of upvotes, but a lot also get ignored. On the other hand, commenting on highly active threads seems like a more consistent way to rack up upvotes over time.

For those of you with high karma, what worked best for you? Do you focus more on posting or commenting? Any tips?

Let me know what you think!