How can I make a custom rule to toggle the mimemail user account preference?

Hi, I am trying to code a custom rules action to toggle the mimemail preference for sending html/text email.

This is my custom rules action:

function mymodule_rules_action_toggle_mimemail_preference($account) {
  // mimemail_user_presave() needs to be disabled for this to work.
  $mimemail_preference = $account->data['mimemail_textonly'];
  if ($mimemail_preference == 0) {
    $account->data['mimemail_textonly'] = 1;
  }
  else {
    $account->data['mimemail_textonly'] = 0;
  }
  user_save($account);
}

The issue I ran into is that Mimemail calls hook_user_presave(), which blocks this action from being evaluated:

function mimemail_user_presave(&$edit, $account, $category) {
  $edit['data']['mimemail_textonly'] = isset($edit['mimemail_textonly']) ? $edit['mimemail_textonly'] : 0;
}

This is necessary to update the user profile, but how do I get around this in Rules?