Every one of the five great-person combinations rests on the same two conditions, dignity by sign and placement in an angle, and Malavya is the Venus member. Because the conditions are simple and the qualifying signs numerous, the class as a whole is much more common than its name suggests, and the classical literature is aware of this.
The handbooks respond in two ways. They add conditions of strength, so that a yoga present in outline may be judged absent in effect, and they place the reading of any single combination inside a whole-chart judgment, where a great-person yoga in a chart otherwise afflicted is not read as producing a great person. The second move is the more important one, and it is the general method of the tradition rather than a special provision for this class.
Modern summaries that list the five yogas as a table of results without those conditions misrepresent the corpus they draw on. The atlas sets out the rule, the results the tradition attaches to it and the qualifications the tradition attaches to those, and does not present any of it as advice, which in jyotisha is the work of a trained astrologer reading a whole chart.
Venus is also the planet whose qualifying signs, Taurus, Libra and Pisces, are furthest apart in the zodiac, which is a small structural point with a practical consequence: the three sit in three different quadrants and three different elements, so the Malavya condition is not clustered in one region of the chart. Similar observations can be made for each of the five, and they are the sort of detail that a general account of the class necessarily leaves out.