I bought some natural-grey handspun wool in a Slovenian village and want to make a rustic pullover with a classic aran pattern out of it. The problem is that, although the wool wraps to 9 wpi (which is "worsted" on Ravelry), it knits up to 14x18 on 5 mm needles. But the patterns I find are in the 18 to 24 stitches range.
I know well that your first thought will be "change the needle size" but I don't want to do that. So the question is asking specifically about getting the pullover made at the current gauge.
I cannot just knit less stitches in the circumference of an existing pattern, because the aran patterns have narrow vertical stripes of stitch patterns which cannot be reduced well. So I will have to scale. I calculated that to make a generously-eased pullover of 100 cm circumference at my gauge, I could use a pattern which is intended to make a 55 cm chest circumference at a 24 gauge. This would be a children's pattern.
If I follow such a pattern, is there a good chance that the pullover will scale properly for me? Also, will some pattern constructions work better than others, e.g. should I avoid raglans because they give me less controll to adjust the length in the shoulder area?
P.S. Please note that this is not a question about alternative ways of getting the size I want. I am asking for answers which address specifically the questions in the title and in the last paragraph.