Here's how I got mine rooted.
1.Download KingRoot and AnTuTu.
2.Close out of all of your apps.
3.Open AnTuTu and run the benchmark.
4.Wait until AnTuTu hits 10%, then IMMEDIATELY hit home and open KingRoot
5.Hit the blue button to root as usual
6.Once the root goes to about 35%, the AnTuTu graphics test will start.
7.Once it ends, it should kick you back to KingRoot by itself.
8.KingRoot should then jump quickly to 100%
9.Once it does a blue button will pop up. Click it and wait.
10.After it loads, you should get a check mark. This means you're rooted.
KingUser (SuperUser) will already be installed, so just verify root with Root Checker.