PvP meta is all about burst damage now. RIP to cancer comps and fever times.
Having one ignited attacker should suffice if you are planning on climbing to Plat V. A debuffer or two that targets speed or skill gauge is extremely helpful at stalling the other team. Having someone like Wood Sytry or Nirrti helps too.
For defense, Dana is kinda obsolete at higher leagues while still useable at lower leagues. Water Neptune would be a better tank as she slows anyone who attacks her on top of having taunt already. Thisbe would be a great support for PvP as she has immortality and she can fill your allies' skill gauge quicker.