Statistically speaking, it is much harder. The risk of running it compared to the 16 orb strat is way higher due to the mechanics you are choosing to incite during your run. When you have the aura around you and are invincible, other than doxology you cannot be killed. No knight strat forces you to attempt a coordinated strike with four players multiple times throughout the raid while running out of the invincibility aura, across the map to god knows where (the ogres tend to wander) and towards a bunch of shit (or a little if add control on your team is good) that wants to kill you. This action repeated four times throughout the encounter is inherently making the raid more risky for your fire team and harder than the 16 orb strat. 16 orb strat the only time you ever leave the safety of the aura is once at the very end to detonate all 16 bombs at once. And you don't leave the aura until all the adds are cleared. Making it way, way, lower risk and a much easier strat to execute. If no knight strat works for you and your team... great. Use it. But you are making it harder on yourself by using that strat. That isn't opinion, that is a fact.