what keyword tool do you use for 7search ppc?

iam curious to know how do you do keyword analysis if you advertising through 7search?
do you use any third party keyword tool you use like semrush,long tail pro etc. or you use 7search keyword tool?
I heard that there are still good sources available in 7search which we have to ask customer service to block non perform sub-ids & get good sources of traffic?

bump

I can't add a link yet, but I can point you in the right direction. I just learned this tip myself, but search for 7search top 500 keywords. You'll see some pretty high bids but don't actually bid those prices, this just gives you an idea of niches that 7search has a high presence within and will probably have better luck with your PPC campaigns if you stick to those. Good luck!

7Search is crap... Don't waste any money. Use Bing or Adwords.

Also, they have a keyword tool in their backend and you can see what other people are bidding and the estimated amount of clicks you could receive.