The given method is no longer optimal. The reasons for it are simple.
There are more sources for EXP % bonuses. Cains is considered one of those sources since back then nobody could use cains in inferno pre-1.05, but now with mp0 you could wear cains.
Secondly, hellfire rings.
So in short, clearing elites for EXP bonus is not worth the time especially with the time it takes to clear an elite. You're better off just clearing areas with alot of trash mobs. In this case, it would be Keeps 2 which has the highest concentration and number of those ingame.
If you want to dispute that you can always provide a video showing how you get more exp from an alkaizer run. I'm up for that.
I don't understand your logic. You're saying that a proven method is no longer valid because there are now items that give additional experience bonus? Listen to what you're saying.
The Alkaizer run still nets more experience per hour than your keeps only run. The reason behind this is because you're building 5 stacks of NV right away. 5 stacks provides a huge increase in experience % bonus that you don't have running keeps only. The first two ports of the Alkaizer run allow you to gain these stacks in a matter of 1 to 2 minutes, and then the rest of the run is all profit.
If I want to dispute it I have to show you a video? How about you show a video of keeps out performing the many of videos showing Alkaizer netting more than 1.5/mil a minute?
Sorry Uber, if you find keeps easier and more enjoyable for you then that is fine; however, it doesn't provide more experience than a proper Alkaizer run.
I have never properly recorded my xp/min or xp/hr, but from what I understand Uber's logic is that he is able to kill white mobs at blinding speed even with using XP boosting items such as Cain's set. Granted, Neph Valor does supply an extra 15% XP bonus per stack, but then again you have to figure in how much longer your run is in total by killing those elites. So, let's do some math:
Every monster inherently gives you 100% XP per kill
Bonus' are as follow:
30% Cain's set
30% (potential) Leoric's Signet
31% Ruby in helm
7% (or so?) follower w/ Hellfire + Signet
For a total of 133% bonus to XP boost = 233% XP per kill
Now, consider that you also have the ability to get another 75% total XP bonus from Neph Valor stacks for a total of 308% XP per kill.
308/233 = 1.32 which is the ratio of your XP at 5 stacks of neph valor to Uber's XP value while he runs with just XP boosting equipment.
This means that at 5 stacks of neph valor you only really gain 32% more XP total from mobs then Uber. That does not take into account the enemies you are killing during your run while not under the influence of 5 stacks, which further reduces the amount of bonus XP you are actually gaining from killing elites.
If these numbers hold true, Uber would really only have to kill white mobs at a slightly faster pace then you while skipping elites in order to make up the difference of the Neph Valor stacks.....something I think he can do after seeing his farming methods in action. Granted, I would say his chances of getting a legendary per run is decreased compared to your method by eliminating the bonus Magic Find from Valor and the guaranteed rare drop from elite packs at 5 stacks, but the fact that he can keep pace with xp/min seems not only feasible, but relatively easy to imagine.
I guess it all really depends on what you are looking for....but as for your argument, I think both ways yield results. Alkaizer has proven his run is quick and efficient, but I believe Uber's run takes into account equipment that Alkaizer didn't have available to him (at least while remaining efficient).