I love staged parallel coils, but the 32 and 24 have very different needs, I would look at using wire closer together, like 3 twisted strands of 32 in parallel with a 24. The 32 will heat very quickly by itself, and the 24will still be ramping up as the 32 is totally heated up. Twisting the strands will act as a slightly thicker wire, heating a bit slower, but still quicker than the 24.
For a basic parallel, a 28/24 parallel would work well, I used to use a lot of two strands 28 twisted in parallel with a strand of 24 with good results. My favorite wire for rda's at this point is 2x30 twisted and than twisted with a piece of 26, and my favorite rta wire so far is 2 twisted 30 than twisted with a piece of 28.