Salaam Whisper

Don’t have all the answers you need, but have a bit of research on perhaps something useful for your Equivalence idea. Universes do not exist by themselves, they are mapped to each other, the mapping is what makes them to show existence per human cognition and spiritualities, the universes by themselves are not cognizable:

Nasafi

http://untiredwithloving.org/nasafi_mirror.html :

Know that the Alam-Saghir (Minor Universe) is a copy and a Nemūdār (Vectorial Abstraction) of the Alam-Kabir (Eminent Universe) and whatever is in the Alam-Kabir is also found in Alam-Saghir. So whatever is found within the Alam-Kabir (Eminent Universe) it ought to have a Nemudar (Vectorial Abstraction) within the Alam-Saghir (Minor Universe), otherwise any description of that object is inaccurate and false.

Definition: According to the treatise 10 of Nasafi Chapter 5 Nemudar of the beautitude of the Paradise are the temporal pleasures on this earth and the Nemudar of the torments of the Hell are the sufferings of humanity on this earth. Based upon this description the best translation for the Farsi word Nemudar is ‘Abstraction’ of something in some universe which is projected or imaged into another. Due to this aspect of the projection or imaging then the attribute ‘Vectorial’ is added, so Nemudar is Vectorial Abstraction.

http://www.untiredwithloving.org/jabarut_malakut_mulk.html :

Insan Kamil
Azizeddin Nasafi

“O Darwish! The relatedness of these universes are brimful with Ishq (Unary Unrestrained Love), every relatedness (say A in one universe is related to B in another universe) serves as mirror (reflects an image of A into B) while the antecedent and precedent (A and B) are actually in love with each other, and both in love with the mirror as well.

Suyuti Al-Ghazali on Muqabala , probably what you need to study:

http://untiredwithloving.org/suyuti_fathul_jalil.html#muqabalah
Mapping one universe to another

Al-Ghazali
“I say (it is my opinion): Since the universe of Shahada (Observables) became an ‘elevator’ towards the universe of Malakut (Spiritual Realms) and Suluk (Voyage) of Sirat-Al-Mustaqim (The Straight Path) refers to this upward glide i.e. the Din (Religion, way of spiritual life) and the resting-places of the Divine Guidance, therefore if there was no relationships and connections between these universes how could then be any form or glide from one to the other?

Due to the Divine Mercy there is‘equivalence’ between the realm of Shahad (Observables) and Malakut (Realm of Spirits) i.e. entities in one realm are corresponded to the entities in the other realm! Perhaps an entity in the Malakut (Realm of Spirits) has multitudes of corresponding entities in this world. Therefore a metaphor (e.g. entering and exiting the light) becomes an ‘exhibited display’ of an analog (of something in the other universe) and therefore corresponds to an entity in another universe and this correspondence is called Al-Mutabaqah.

Salaam Whisper and Salaam to everyone

Ibada is basically a term unknown to modern Muslims, their best understanding is what they watched in Hollywood movies depicting a person in cosmetic ritualistic acts of worship. So I admire a person as yourself who asks such honest and genuine question.

I cannot answer this question in any straightforward way, however over the years collected bits and pieces from books:

In Sunni books of the Arab, there are references to the Prophet’s saying that glancing upon the face of Imam Ali is Ibada! Does this mean worship, no not in the language Arab:

http://www.untiredwithloving.org/ali.html

the glance upon one parents’ face is Ibada, said the Prophet peace be upon him.

Or
‘The best of a man’s Ibada (Servitude for Allah) is his good opinions/judgments (about Allah or people)’, said the Prophet.

Or
‘The faster stays within the (state of) Ibada (Servitude for Allah), from dawn till dusk, if he does not backbite; if he does backbite his fasting is ruined’, said the Prophet.

The highest level and most precious Ibada:

Thinking

‘There is no poverty worse than ignorance, no investment with more return than that of ‘Aql (Intellect), and no Ibada (Servitude for Allah) like unto the Tafakkur (Thinking)’, said the Prophet.

Lisan Al-Arab
Ibn Manzour
‘Abada is the odoriferous incense burning on fire, ‘Abd is a plant with nice aroma.

‘Abd has the botanical nature of blooming aromatic plants and in extreme cases like an incense burning upon the flares of trials and tribulations, only to give out one of the most unique and loveliest aromas in heavens and earth.

Sometimes a plant must be dried i.e. dead in order for it to burn on the fire to give off lovely aroma, so are many ‘Abid (Servants of Allah) during their lives no one senses anything from their direction, but upon their death universe fills with the aroma of Divine Beauty!

Salaam Whisper and Salaam to everyone

Best reference for spirituality of Dhikr, from Qushairi Manifest:

http://www.untiredwithloving.org/qushairi_dhikr.html 

Most important concept in metaphysics of Sufis is that human being cannot remember Allah in any form, nor even to mention the Divine Name, but it was Allah all along that remembered or mentioned the human being and the primordial echo of that remembrance or mention is our words remembering Allah:

http://www.untiredwithloving.org/ibn_ataa_hekam_dhikr.html

For that matter the terminology of Qabiliyat has been used:

http://www.untiredwithloving.org/qabiliyat.html

Human being a Divine Musical Instrument, and sounds coming out of him or her are nothing but Dhikr of Allah as in primordial memory accessed to understand something of Allah:

http://www.untiredwithloving.org/muddakir.html

Being good to the mother is a requirement for a man to do proper Dhikr of remembrance of Allah, per Hadith of the Prophet:

http://www.untiredwithloving.org/dhikr_mother.html