Just two things for this one. Use the embedded links to find what the users running what you need for these.
1. Running Unlimited 11's and/or Auto 11's is not required by the user trying to level up.
2. Rate not just the profile of someone running Auto 11's but their photos too. There is no quick way to do it, they must be done manually. Cherry bomb will not help this.
While you are at it, if you use your phone/mobile app, this will go a lot faster. You can also do the achievement Old School Rate Fest where you rate 10,000 photos in 24 hours.
To find boomerangs, you can search for them
Then on the left, choose Boomerang
Now, there are ways to rate the same boomerang more than once. When there is a bonus for profile 11 ratings, people will run a FAMPlifier with their boomerang, so you can search for those as well. Very few times will you see a FAMP being run by itself but it does happen.
If you rate a profile that has both Boomerang and Famplifier running, look at when the famplifier will end. This graphic will show how to find that out.
So with some work, you can rerate and get the 250 boomerangs taken care of faster this way, but wait, there's more!
A Big Bang Power up will also do the same thing, some users will run all three and if they time it right, you can do even more rates.
At the time of this writing, there wasn't someone running all three Boomerang, Famplifier and Big Bang, but this next graphic will show how if someone is running them, it is possible to rate the same boomerang as many as SEVEN times.
I made this "schedule" for people who are trying to get their profile rated as many times as potentially possible, but it can be used here for illustrative purposes.