Springstay location question

[mariner2k]

Hi, I'm not sure what to make of the angles I calculated regarding mizzen lowers.
If you were to consider the distance of the shrouds forward of the mast as a plane, the angle would be just under 5 degrees.(X two shrouds) The angle from the mast to the actual chainplate is just under 9 degrees. Two questions arise:

First are these angles adequate?

Second, a more general question, does the fact that there are two forward lowers as opposed to say one straight forward(theoretically resembling a baby stay) make up for what appear to be shallow angles?

I do also have the fittings and a chainplate astern to add lower intermediates if necessary. Also,it is a deck stepped mizzen.