"Mastering this trick will make your writing easier and more pleasant to read, as well as eliminating potential ambiguities."
Could you explain the use of the ing form for "eliminating"? It's somewhat unclear to me.
Your confusion over its use is well founded. If I were the editor, I'd change it. Mastering this trick will make... and will eliminate.
It's not parallel as it is written now.
[not a teacher]