Don't pick a roaming build based on camp flipping.
Flipping camps solo is pretty easy. If you want to do it *really fast,* your options are a bit more constrained. But many, many builds can do it in about 30s-1min with zero practice or effort, especially once you have WvW Rank points in "Guard Killer" to give you a ton of free endurance while you're fighting the NPCs.
If you really like Rev and want to get better at it, consider just playing more Rev.
Sword/Sword Power Herald is very mobile, a strong duelist, and reasonably capable in 1vX once you get good. Trailblazer Herald or Trailblazer Renegade are incredibly durable and versatile. (Herald for great personal sustain in a pure melee build, Renegade for the extra flexibility of shortbow — play Mallyx/Jalis and don't bother with Kaalia spirits in a condi build, imo.) Nice thing about doing it all on one character is you can switch builds/roles even if the map you're on has a full queue.
P/D Condi Thief is cancer but it's honestly more just a build check for your opponents than a real good roaming build in its own right. For thief, Power builds have much better traits and weapon support, and better play-making potential in small-scale skirmishes (imo).