However, I think we forget that OP was more than likely capable of moving about his house in the pitch dark and knew the layout of the bathroom intimately, just as we all are in our own homes but an intruder could not possibly know what was happening past the entrance to the bathroom and the layout of the room certainly giving OP the upper hand, if there was an intruder of course.
I really can't see how OP could have had the
"upper hand" going down the passage to the bathroom, as it seems to me that to the contrary from the layout it appears it was the intruder/s who had a
huge advantage over OP. They had perfect ambush positions at the corners of the two left turns OP had to take to enter the bathroom, and while OP would have no idea where the intruder/s were situated, whether in the passage, bathroom, toilet or shower, these could wait patiently guns at the ready listening to OP coming closer while trumpeting his progress with "Reeva call the police" and "get out of my house".
The diagram at
http://tinyurl.com/qbbzkhl with the red line tracing OP's path shows the dangers. The first likely ambush at the end of the passage where OP has to poke his head around the corner to check if the coast is clear before moving further in, and at the next corner another likely ambush where he has to enter into the bathroom where intruder/s could be waiting ready to gun him down as he claims he genuinely believed they were about to do. And that's not including a surprise attack by an intruder coming from the shower or crawling out from under the hanging double sink and shooting him from behind while he is double tapping at the toilet door.
Nope, imo, no matter how "intimately" OP knew the layout it could serve him little as at every turn he would be exposing himself to attack, so much so. that, considering the "terror" and "fear" he claims he felt on hearing intruders in the house, is is unfathomable that he would venture on stumps to run the gauntlet to the bathroom where the intruder/s, guns at the ready, could be waiting patiently to shoot him no sooner he appeared in their sites... but no, instead the intruder/s poised to attack him and Reeva hides in the loo!
So for me, OP's story is utterly and irremediably ridiculous, and methinks Oscar had better not take the stand if he wishes to preserve even a minimum chance of getting away with culpable homicide.