>>537744951
Deflection can literally never hit 100%, but let's ignore that and say that you can with very high investment.
Let's also say that you have that one node that gives +6% deflected, so you only take 54% of damage (aka 85% more HP)
With all this in mind, all you need to beat deflection in max hit is get 85% of your max hp as ES, since Eva chars usually sit around 1-1.5k HP that's about 800-1250 ES, which is not exactly hard to hit, ES upwards of 4k is pretty achievable for even medium investment, considering that you also had to spec Deflect on the tree in this scenario, you'd be putting that into ES.
The result is that you trade a bit of raw evasion (which is already running into DR issues anyway because of the change this league) for insanely more raw hitpoints, not to mention that going ES+Evasion allows you to run Ghost Shrouds which at the very least doubles your EHP in non oneshot scenarios, in some even 3-5x.
Deflection really is just a meme.