I'm wondering if there's a single litrpg novel where any of the characters have a boomerang skill. Let me know if you can think of any. Boomerangs are weapons (apparently) after all.
The problem with that is that while they might have been used in battle it would have been by a primitive fighting force like clubs or slings. It's probably rather easy to dodge if you see it coming. It might be nice seeing a tribal character using one or someone caught in a system apocalypse with that as the first weapon they came across(Like Shovel in Spades with shovels). That being said boomerang skills that turn around and attack again seem more common.