I am currently using multicols and would like to organize my columns in a way that some paragraphs can occupy multiple columns. Like as follows
With the red blue and green lines all being different sections of text. I have already looked at flowfram, but this does not solve my problem because it would only works if each page is painstakingly handcrafted pixel by pixel, em by em, or pt by pt. If there is a tool which simply allows me to define the position of my frames and columns in relation to one another, and define the size of my columns with respect to multicol's \columnsize argument, that tool would suffice.


flowframfor this and specify a layout for a set of pages. Do you have a layout that differs from one page to the next?flowfram, but it may just be difficult to maintain. TeX enjoys a recti-linear setup, but has arbitrary paragraph forming difficulty](tex.stackexchange.com/a/129137/5764).