How did you decide on this number. This would be after the Mongols, Black Death, Timurids, Civil Wars and contraction. Even today Georgia mobilizing that kind of numbers would require 3 % of it's population. Georgian population was 761,000 in 1770, 892,100 in 1832 and 1,641,900 in 1886.Kartvelians could muster some 120,000 men from similar sources
East Africa was already Islamic turf by the 12th century with extensive migrations from the Middle east, even in the home of Orthodoxy where he could have realistically gone and only with Muslim help. Also he and all others after him would've died from Malaria or Tse Tse further south of Aksum.even further beyond to the east coast of Africa, where he prozletyzed amongst the pagan tribes of the region. In the process, he became the first of the famed Orthodox ‘African Fathers’, to be joined by other Kartvelians, Avars and Trapezuntines.