I've only done it once with a random duty finder group who were excellent and I can tell you what I learned.

The MT should be spam healed by both healers, if he dies the fight tends to end up on the back foot for a bit.

In meteor phase only tanks soaked meteors. DPS and both healers attacked the rift and we were out of there really fast.

Make sure when the rift opens as many people as possible run away long enough to let the bleed effect expire.

Usually if you request this before the fight starts it will be easier. I think the main problem experienced players don't explain mechanics and those new people who have watched a video to see the mechanics get confused because someone people vary in their approach to meteor. Some people have tank/healers soak, some request everyone soaks and LB3. You need to ask or request a plan of action before the fight starts.