Two additional points to complicate your considerations.
First, the first reflection point to your ear is the floor in front of the speaker (it's closer). So changing wall reflections points cannot be considered in isolation. Any effect may be lost or amplified by the interaction with other reflection points, particularly closer, stronger ones.
Second, different frequencies are bounced, absorbed or partly abosorbed depending upon what it is hitting. So the composition of the reflection point is as significant as its location.
So in other words, just fiddle around with it and see what you like. Speaker manufacturers are also a good source of information as whether their speakers should be toed in or not, and by how much.
First, the first reflection point to your ear is the floor in front of the speaker (it's closer). So changing wall reflections points cannot be considered in isolation. Any effect may be lost or amplified by the interaction with other reflection points, particularly closer, stronger ones.
Second, different frequencies are bounced, absorbed or partly abosorbed depending upon what it is hitting. So the composition of the reflection point is as significant as its location.
So in other words, just fiddle around with it and see what you like. Speaker manufacturers are also a good source of information as whether their speakers should be toed in or not, and by how much.