Are there any alternative formulations of the five skandas? Considering the 5 skandas of


Form
Feeling
Perception
Volition
Consciousness


I was told during a study group once that this was only one of many possible formulations of the skandas and other groupings and numbers of skandas were possible and used. However I have never come across any variation in this scheme. Is anyone aware of any alternative formulations of the five skandas?
Here is a fairly comprehensive list of alternatives:

Onefold: saṅkhāra


formations; everything that arises and ceases 
all five aggregates fit in this category.


Twofold: nāmarūpa 


name and form (body and mind); divided into material (rūpa) and immaterial (arūpa) 
the first aggregate is rūpa, the rest are nāma.


Threefold: paramattha-dhamma 


ultimate reality; divided into citta, cetasika and rūpa (excluding nibbāna, which is khandha-vimutti - liberated from the khandas) 
the first aggregate is rūpa, the fifth is citta, the other three are cetasika.


Fourfold: satipaṭṭhāna


objects of the establishing of remembrance; body, feelings, mind, dhammas
body is first aggregate, feelings is second, mind is fifth, dhammas is all five.


Fourfold: ariyasacca


noble truths
all five fall under the first noble truth, besides tanha (under the fourth aggregate), which constitutes the second noble truth.


Twelvefold: āyatana


bases; the six internal (eye, ear, nose, tongue, body, mind) and six external (sights, sounds, smells, tastes, sensations, thoughts)
all five aggregates arise based on the contact between each of the first five internal bases with their external counterpart. As for the sixth, rūpa is excluded (but still present as hadayavatthu) since thoughts are not physical, nor is the mind.


Twelvefold: paticcasamupāda


dependent origination; ignorance, mental formations, consciousness, body and mind, six sense bases, contact, feeling, craving, clinging, becoming, birth, suffering.
ignorance and mental formations are part of the fourth aggregate; consciousness is the fifth; body and mind are all five; six sense bases as above; contact is fourth; feeling is second; craving, clinging, and becoming are fourth; birth is probably fifth?; suffering is all five except tanha.


Eighteenfold: dhatu


elements; as with the āyatana, adding the six viññāṇa
as with āyatana, but described as contact between the three.


Twentytwofold: indriya


faculties; the six sense faculties, the two genders and the life faculty, the five feeling faculties, the five mental faculties, and three enlightenment faculties (see here for details)
the first group involves all five aggregates, the second is part of the first aggregate,, the third is equivalent to the second aggregate, the fourth falls under the fourth aggregate, and the fifth may be khandha-vimutti, but I'm not sure.