7th density work here in 3rd density

[Peregrinus]

Can 6th density not be considered reaching full aspect of archetype though?

Archetype?

With reference to the 6th density being the fully acquired higher, self 7th density would be considered the practice of unconditional love so that upon reentering octave one would be whole and capable of balanced creation with regards to hosting life or the opportunity for others or parts of the own self to start to reincarnate/incarnate.

This statement (question?) puzzles me, so forgive me if I answer incorrectly or incompletely. The higher self, would be, from the human perspective, the future self that has some billions of years of conscious experience, offering itself as a resource for third, fourth, and fifth density self. The higher self oversees the entire third density incarnate experience, making alterations/changes in order to facilitate increased or decreased catalyst as necessary, working towards the goals set forth in the life contract.

The third density is the density of choice, polarizing either positively or negatively.
The fourth density is the density of love, or understanding the unity of all things.
The fifth density is the density of light, gaining wisdom into the vast and intricate mechanics of Creation.
The sixth density is the density of the Law of One, blending and balancing the vibrations of fifth and sixth density.
The seventh density is the density of foreverness, reaching towards the end of the octave.

With in regards to graduation of density, is it not possible for one to project back into 3rd density from a higher density to exponentiate catalyst?

Yes, any fourth, fifth, or sixth density entity may choose to return to third density, however, the majority of wanderers are of sixth density.