Every human being comes under one of seven cosmic or psychic circles. This determines the number of angels specifically assigned to you. Your goal should be to grow spiritually and intellectually to attain the 1st psychic circle! That's the ultimate best place to be at! But at least, strive to attain the 3rd circle. Hallelujah! 
7th cosmic circle: 1 seraphim with 288 cherubim are assigned to a group of 1,000 mortals.
6th cosmic circle: 2 seraphim with 288 cherubim are assigned to a group of 500 mortals.
5th cosmic circle: 2 seraphim with 288 cherubim are assigned to a group of 100 mortals.
4th cosmic circle: 2 seraphim with 288 cherubim are assigned to a group of 10 mortals.
3rd, 2nd & 1st cosmic circles: 2 seraphim angels are assigned to 1 human. ("...a certain pair of equally qualified seraphim..." - 113:2.7)
3rd, 2nd & 1st cosmic circles: The individual has 4 angels assigned to him and dedicated to working for him => 2 seraphim, 1 cherubim and 1 sanobim.
= = = = = = =
👉🏾 Guardian angels assignment to mortals is determined by the psychic or cosmic level of the individual human being. For psychic circles, please see paper 110:6, "The Seven Psychic Circles".
👉🏾 Please, note: a company of angels equals 144 pairs of angels or a total of 288 individual angels (paper 38:6.1).
👉🏾 Guardian angels are seraphim. Paper 113:0.1, "...the guardian angels, seraphim devoted to the ministry to individual mortals..."
👉🏾 3rd, 2nd & 1st cosmic circles: The individual has 4 angels assigned to him and dedicated to working for him => 2 seraphim, 1 cherubim and 1 sanobim.
= = = = = = =
113:2.9 When a seraphic pair accept guardian assignment, they serve for the remainder of the life of that human being. The complement of being (one of the two angels) becomes the recorder of the undertaking. These complemental seraphim are the recording angels of the mortals of the evolutionary worlds. The records are kept by the pair of cherubim (a cherubim and a sanobim) who are always associated with the seraphic guardians, but these records are always sponsored by one of the seraphim.
Glory to the Father! Hallelujah!
113:1.7 Human beings in the initial or seventh circle have one guardian angel with one company of assisting cherubim assigned to the watchcare and custody of one thousand mortals. In the sixth circle, a seraphic pair with one company of cherubim is assigned to guide these ascending mortals in groups of five hundred. When the fifth circle is attained, human beings are grouped in companies of approximately one hundred, and a pair of guardian seraphim with a group of cherubim is placed in charge. Upon attainment of the fourth circle, mortal beings are assembled in groups of ten, and again charge is given to a pair of seraphim, assisted by one company of cherubim.
113:1.8 When a mortal mind breaks through the inertia of animal legacy and attains the third circle of human intellectuality and acquired spirituality, a personal angel (in reality two) will henceforth be wholly and exclusively devoted to this ascending mortal. And thus these human souls, in addition to the ever-present and increasingly efficient indwelling Thought Adjusters, receive the undivided assistance of these personal guardians of destiny in all their efforts to finish the third circle, traverse the second, and attain the first.
Source: The Urantia Book, Paper 113 www.urantia.org
