There are 2 methods that I recommend using, and 1 that I don’t really recommend using.
Method 1 would be raycasting, but to be honest I myself have no clue how to raycast because it’s too much for my brain to handle.
Method 2 would be using GetPartBoundsInBox, I myself have started using it recently, and I can 100% tell that it is way more reliable than method 3, and way more consistent.
Method 3 is hit.Parent, but this is pretty unreliable, because you’re only using 1 part to deal damage which can get very inconsistent.
I would definitely recommend method 2 for hit detection.
It really depends on how you use the part. I was assuming he wants to use hit detection for a PVP game, so obviously using hit.Parent is very unreliable in some aspects.
For pvp/fighting games, it’s overall better to just use GetPartBoundsInBox because it “scans” a set area, and deals damage to anyone who is in that area.
But if you’re trying to use it for a different thing, reliability may vary depending on how you want to use it.