Customising parallel runs

Hi Team ,

We are trying to figure out a way to run our test cases in a customised  parallel fashion . 

To start with , we are using readyAPI paid version 3.2.5.

Our Project structure is 

1.TestSuite1
     1.1 TestSuite1_Positive  >  100 cases
     1.2 TestSuite1_Negative > 20 cases

2. TestSuite2
     2.1 TestSuite2_Positive.  > 50 cases 
     2.2 TestSuite2_Negative  > 30 cases

3. TestSuite3
     3.1 TestSuite3_Positive  > 50 cases 

4. TestSuite4
    4.1 TestSuite4_positive. > 10 cases

test Suite 2 is dependent on TestSuite1 and it should run only after TestSuite1 is completed.

TestSuite 4 is dependent on TestSuite3 and it should run only after TestSuite3 is completed

TestSuite1 and TestSuite3 are independent and can run in parallel and TestSuite2 and TestSuite4 can run in parallel.

What we are trying to achieve here to once we start our run , TestSuite1 and TestSuite3 should run in parallel.
Once TestSuite1 complete its run TestSuite2 should start , similar for TestSuite3 and TestSuite4.

Kindly help .