Set up the text of your post using the Advanced reply editor (Go advanced).
Scroll down to "manage attachments" and add all the images you have in mind. Upload the images but do not submit your post yet.
Next click where you want to add an image in your text. I recommend doing this at the beginning of a new line either above or below your text.
Now click on the paperclip icon at the top of the text editor to see a list of images you have just uploaded. Select the image and insert. repeat the process until you have all images added to your post.
You post can look like this:
This is a donut:
This is a better Donut:
This is a perfect donut: