Who might the other two SMCs that most wanderers on Earth incarnate from be?

[Jade]

I can't remember WHERE in the LOO material, but in it, Ra explicitly states that VERY VERY rarely, an early 6D negative will choose to incarnate as a wanderer to gain negative polarity, and that this is extremely uncommon. Nonetheless, it happens. And from what I was able to tell, in the INCREDIBLY RARE event of a negative wanderer, it will most likely be early 6D. Like Ra said though: extremely rare.

Yes, I mentioned this but didn't post the quote.

36.16 ▶ Questioner: Then the sixth-density entity who has reached that point in positive orientation may choose to become what we call a Wanderer and move back. I am wondering if this ever occurs with a negatively oriented sixth-density entity? Do any move back as Wanderers?

Ra: I am Ra. Once the negatively polarized entity has reached a certain point in the wisdom density it becomes extremely unlikely that it will choose to risk the forgetting, for this polarization is not selfless but selfish and with wisdom realizes the jeopardy of such “wandering.” Occasionally a sixth-density negative entity becomes a Wanderer in an effort to continue to polarize towards the negative. This is extremely unusual.

I don't think a 6th density negative entity will wander to 3D to flip polarities - but this quote makes me think they might do it so that they can accrue some karma and continue a while in the negative playground before making the flip.