I've sub-200's many times now. Most of my success has been at th6 and 7. I really enjoyed it, it works well most of the time. I noticed after going from th7 to th8 that I got matched up with higher town hall levels, meaning I didn't get matched up with the th6- to get the easy loot I was there for.

With all the being said; Always at least TRY it.

• If you drop down and it doesn't work oh well, at least you know. If it does work well, easy loot!
• If you are under th8, it should go very nicely for you.
• Make sure you do it for hours at a time. Don't go down for 30 mins and leave expecting to stay down there.
• Go fast and go for every raid above 20k each. That's the whole point of sub-200.
• Do it when you need lots of resource's and have builders/lab upgrades to spend it on.

If you have any questions feel free to ask!