Shorter board

(Sorry for my not so great English)

So I have the following Situation: I (168cm, 82kg / 5'5, 180lbs) ride a Burton custom camber 156cm. Its good for high speeds but feels a bit too long for park/freestyle, plus its pretty stiff for that too. I'm looking for a smaller board, but my problem is that for my short height I cannot find short boards that also match my weight parameter.

So my Idea was the following: Buying a stiffer board like the Burtom Custom X in a size like 148/152 would be perfect in size, but my weight would be too high according their size chart which would mean that this board would act as a less stiffer board under my weight which would be great for park.

Is there any mistake in my thought-process and if not what size could you recommend for that?