This is a quick two runs I captured to show a guild member an easy build for arenas. It's comprised of gear that is easily obtained, even if Mother's Sorrow is pricey. You can get cheaper body pieces and give up divines without losing too much. This setup is forgiving without sacrificing too much damage potential, and you can run a resto with radiating regen on the back bar if you still struggle. In that setup, wall of elements can replace weakness on the front bar.
This build won't make you good at mechanics or general combat, but it's a good place to start if you're trying to learn the arena or get titles.
Video is still processing as of this post, but the bitrate and colors on the encode aren't great. I'll correct that if I make more videos in the future.
EP: Slania Isara : Harambe Was an Inside Job