Improving your Blood Raider standings in EVE Online isn't straightforward as they are a pirate faction. Here's what you can do:

Run Missions for Affiliated Groups:

• While the Blood Raiders don't offer missions directly, consider running missions for the Guristas or Sansha Nation. These pirate factions have some connection to the Blood Raiders, and improving your standing with them can indirectly improve your Blood Raider standing.

Complete Storyline Missions:

• Look for storyline missions that appear after completing a set of regular missions for the Guristas or Sansha Nation. These storyline missions may offer a reputation boost with the Blood Raiders.

Train the Criminal Connections Skill:

• Training the Criminal Connections skill can provide a general reputation bonus with pirate factions, including the Blood Raiders.

Important Considerations:

• Improving your standing with pirate factions will likely hurt your standing with Empires (like the Caldari State or Gallente Federation). This is because these groups are typically hostile.
• There are no Epic Arcs specifically for the Blood Raiders, which can be a faster way to raise standings with some factions.

Remember, EVE Online has a complex reputation system. These methods may take time and will likely affect your standing with other groups.