Actually, using excel for building posts is VERY convenient.
For example, lets say I uploaded 100 files for a megathread.
Column A: Paste all 100 file links, sorted by file name.
Column B: Paste all 100 image links, sorted by file name.
Column C: Paste file info(size, duration, format, resolution)
Column D: Automatically build post by combining data from Column A, B, C.
When I want to make a post, I just copy each item in column D and post.
I've been using this method to save a ton of time, before I bought themaposter.