Well, I think for maximum profit per hour, TDS will probably work out more and I have heard roughly 7m/hr as well because you can get a claw drop probably every 4 hours or so at TDS (although not guaranteed).
If your looking for more income in one go or so, try your luck at Armadyl maybe because if you get a hilt, that's a big amount of money in one go.
Personally, I think TDs are a better option for you, it will work out as more money and if your looking for a guide, look them up on youtube because I have seen plenty on there before ^_^