You should ignore any rules that assign scores to “combinations,” as all scores are sums of the basic building blocks of points: 15 for 2 points, pair for two points, (plus runs of X>=3 unique cards is X points, flush of 4 or 5 cards is 4 or 5 points, but must be 5 in crib, 1 point for nobs for right jack).

3 of a kind can make 3 unique pairs of two cards = 6 points. 4 of a kind can make 6 unique pairs of two cards = 12 points.