Besides hes E giving him more attack speed for more autos (more crits).
And most of these items are giving Raw ad stats with crit chance
and items like youmuu's and triforce give you a decent amount of move speed to be able to not get kited.
I get what you're saying, and that was my thoughts before i tried this build, but its actually pretty fun.
i mean, your burst is insane with youmuu's, Sheen, Shiv(or the cannon item) and your normal spell combo.
...Maybe the regular armor pen AD build is better, but less people are building that armor, so you really only have the raw AD to go for, Maybe a little of that armor pen.
people have this fight or flight trigger in their mind. ~ when Wukong combos you and takes 80%+ of your hp, you're gonna run.
When Wukong only takes maybe 40% right away, you're gonna fight. and that's a mistake, cause hes gonna then crit you in many auto attacks in the following 1-2 seconds for your remaining health.
[slayer-jinx-catface] Just theory crafting.