With Season 7 in full swing, STO has added a ton of new content and things to keep track of. One of these new things is reputation. Most of us know and understand what reputation is at this point. Romulan reputation is built by contributing Romulan Marks to your personal reputation missions.
One of the easiest ways to earn Romulan Marks is to run the daily space missions in the Tau Dewa Sector Block. You can get the daily mission by speaking with Subcommander Mivek (bottom right corner of your screen while in Tau Dewa sector space). She offers both the Romulan Daily mission and the Daily Red Alert for the sector.
The number of systems you visit and missions you do to complete this daily mission can vary depending on which systems you enter and which missions you do. Each one gives you a percentage towards completing the goal. Below you'll find a list of systems as well as the mission you find in each system and the percentage towards 100% that you'll earn for completing it.
Remember, this can be done daily so find your favorites or the ones that provide the highest return and it's a fast way to earn Romulan Marks.
Jouret System: Assist construction facility. Percentage: 15%
Carraya System: Defeat Tal Shiar ships (5 groups). Percentage: 20%
Acamar System: Rendezvous with and assist Acamarian negotiations. Percentage: 15%
Japori System: Defeat Nausicaans. Percentage: 20%
Beta Thoridor System: Defeat Klingons. Percentage: 20%
Beta Lankal System: Collect Relics (5). Percentage: 20%
Pheben System: Assist Mining Station. Percentage: 15%
Archer System: Defeat Tholian ships. Percentage 20%
Narendra System: Defeat Hirogen ships. Percentage: 20%
Gamma Eridon System: Defeat Gorn ships. Percentage 20%
Galorndon Core System: Assist Gekli. Percentage 15%
Neguencia System: Assist USS Jamestown. Percentage 20% (While I tend to skip this one, you can ust the guide here to get though this mission 5 times quickly.)
There you have it. The systems listed above are the ones that you can visit to fulfill the mission requirements. Obviously the missions requiring you to defeat enemies provide the largest return and will allow you to complete the mission the fastest. Enjoy!