2. Colossus slayer doesn't apply when using hunter's mark: If you use hunter's mark, you don't get colossus slayer damage.
For me Colossus Slayer works with Hunter's Mark, maybe my Ranger is speshull or something.
I did notice that sometimes rarely Colossus Slayer may fail (or work as intended too in case of full HP targets), but vast majority of the time it nukes things at 100% HP (bug) and does work with Hunter's Mark (not bug).
