Hope that the fellowship is weak when they enter your territory.
The ring is meant to be something precious and valuable, and not-at-all easy to acquire.
There's no 100% sure way of getting ring. In fact, it's rather unlikely.

I'm referring to the focus tree part where I seize the ring, cuz I might have f***** up that aspect in my playthrough.

I'm struggling with this too. It's kind of extremely frustrating that it isn't actually possible to ever get the ring as any nation which makes Mordor super weak and any path that needs the ring completely useless.

Id say extremely unlikely.....frodo was alone and injured when he entered my lands as mordor and he solo killed the witch king and 3 other wraiths, still got away, and threw the ring into mt doom

They have plot armor, duh

With the statistics the way they are, pretty much a waste of time playing as Lothlorien if your goal is to get the ring.