Using parent/child relationships for short sequences of images (2-3, maybe 4) has come up multiple times in the past: topic #9653, topic #13182, topic #11401.
help:post relationships still promotes using a Pool for even the smallest sequence. Personally, I agree with Log that short sequences are fine for parent/child relationships, and think the post relationships wiki page should reflect that.
Unfortunately, sometimes these posts are out of order, e.g. the children of post #2684441 (pages 3 and 4 should be swapped). I thought I saw another non-pooled short comic recently that was out of order and then fixed, but I can't find it now; maybe I'm just going crazy. Is there any way to reorder/rearrange child posts?