saham antardasas

Hello, 

There are tow vargas for determining the antardasa of the saham, D40 and D45. Things can be clear when we can just find the best dignified planet by the known rules in either of them. But what happens when D40 and D45 show very much the same result with a different planet, like there are two candidates, one in each varga and both in the same dignity and neither in mrita avasta? How do you proceed?