I would assume, once you have a high rating, you'd just do Battlegrounds.
Because... you will destroy in BG's, and avoid the cleave type teams too.

Plus, your high rating is good for the entire season.
So not playing means you keep the rating without risk of losing it.
And still make a lot of arena points just from the BG playing.

The only reason to really keep going is if you want to raise the rating.