Ectophial is the fastest method I believe, unless you are on Ancient Magicks.
I feel your pain though, I'm far too lazy to do Ghosts Ahoy quest and so I always have to gear up in Varrock and walk all the way to the Barrows. A tip for you though - I have a feeling that you are doing what I used to do, which is completing 1 Barrows run and then teleporting to Varrock to regear and go back. I felt a little silly after I found out you can simply memorize your path through the tunnel once you enter the tomb and open your chest, and simply backtrack through your path to the rope and go back up to the area with the crypt mounds.
This is a much more effective method (if you are not already doing this), as it allows you to complete as many Barrows runs as your combat level/supplies allow, which for me is a good 7-8 rounds atleast. This gives you a much great chance at loot, and you only have to go back to Varrock every hour or so.