I was talking to my husband about this!!
476 is very easy to get to as you spam heroics, GG simple.
Where you’re locked is Crests. To upgrade gear to 483 is something like 15 crests iirc? There’s a 120 cap.
However… Doing Plunderstorm to 5 gets you near 280 that does NOT count toward the cap, so you can get to 483+ that way. But as I was saying in a previous thread, it seems as though all of this is done with such an ulterior motive - I’m sick of it.
At any rate after Tuesday, it should be much easier to get to 483+. Cap raised + vault.