Unfortunately you will always get a bit of a “strobing” – it’s the nature of converting 24 to 30.
However, you can try this:
1- Using After Effects, import the 24 fps footage.
2- Hit command+f to open the “interpret footage” window. Set “conform to frame rate” to 23.976. Set “Separate Fields” to OFF.
3- Drag the footage to the “Create Comp” button (it’s next to the trash can at the bottom of the project window).
4- With the new comp active, hit command+m to send it to the “Render Queue”.
5- Set the “Render Settings” to “Best Settings”. Set “Field Render” to “Lower Field First”. Set “3:2 Pulldown” to any one you choose.
6- Set the “Output Module” to render a QuickTime movie using the DV/DVC Pro NTSC codec.
Hope this works for ya!