Triangulated 4-Link angles

If I'm going to be mounting my bags on my lower bars what is the harshest angle I should go with my upper bars in relation to my lowers. The more extreme the angle, the less articulation I will get with my axle, right? But a bigger angle will equal less pinion change, correct. I know it won't be that major unless I'm hittinn hard switches on the highway but I want to get it as perfect as possible. Also how close to the axle should I mount my bags?

Later

try to get pretty close to parallel, less pinion angle change.