Marksman or Bowmaster

Not true. Well.. kind of true, but I don't think you understand. Bowmasters lose more potential DPS per DEX because they have more to lose. They both lose almost exactly the same percent of their potential damages.

The main reason people say they lose less, is because once you can 100% 2hko a Skelegon with Strafe, you've reached your limit. Bloodmastery makes that take longer for Xbowmen, but they still hit that limit. Bowmasters on the other hand would still be able to reduce how many Hurricane arrows a Skelegon takes.

If you boss, then you lose the same amount of damage proportionally.