Dave held a live stream earlier this evening, linked below, in which he tested attack damage w and without suicides, attack synergies, and boosts using Stark vs RoL WS.
In these tests, none of the attack rating percentages described were represented accurately in the damage against WS. One viewer stated that since Stark’s poise charges raise his attack rating, he may run into a soft cap, whereas a champion with a lower base attack which is not boosted by his kit would benefit more. Another viewer also pointed out that 1 point of attack rating does not equal 1 point of damage, but even then, the percentage increase did not accurately correlate at all.
I would appreciate any clarification the community or mods could offer. Is there a soft cap to attack rating increases outside of a champions kit? Are masteries, boosts, and synergies working as intended? Would people invest in these if they knew the described percentages were not equal to the actual increase in damage?
Start watching at ~1:48:00.
https://youtu.be/NAmXo6eqzec