Be sure your crossposts are following the guidelines of each subreddit.
Just post your model once per day/subreddit. If you can even go once each 3 days or more better.
Delete your accounts constantly.
Lets say you use account1 for 1 week, then delete. Use account2 for week2, then delete.
This helps if account1 is baned sitewide, then all the posts are removed. If you delete before a sitewide ban, the posts stay.
Right now, for "risky" content I just delete the accounts each day and warm them the next day. By risky, I mean OF content that the models are baning/monitoring on reddit.
For my nsfw subs, I just keep accounts posting safe content (even if nsfw, just models/actress not baning content sitewide), but I delete the accounts at 1 week.
I also keep a list of models/actresses who report content, and never post them again. Not worth the hassle.