Jhin: Building Straight AD vs AS and Crit Chance. (His Passive)

:: From Wiki ::

Every Moment Matters: Jhin's Critical strike icon.png critical strikes grant him 10% (+ 4% per 10% bonus attack speed) bonus movement speed for 2 seconds, but his total critical damage is reduced by 25%.

Additionally, he gains 2% - 40% (based on level) (+ 4% per 10% critical strike chance) (+ 2.5% per 10% bonus attack speed) AD as bonus attack damage. ::

Between that and Google I've found conflicting information. I'm trying to compare the AD effectiveness of building AD vs AS & Crit-Chance. Obviously Straightforward AD will give more AD and a good build will have both options, but I'd like to know just how well the passive's scaling works.

Some pages/posts have said his final AD is {Base + Bonus} + [Level Scaling] PLUS (40%Crit-Chance) PLUS (25%AS). Other pages/posts said his final AD is {Base + Bonus} + [Level Scaling] MULTIPLIED BY (40%Crit-Chance) MULTIPLIED BY (25%AS).

Those are very different equations with rather different results. So, which of those is accurate? (Or if neither is that how does it work?) And ultimately how effective us building AS and Crit-Chance over AD on Jhin?

Edit::

Oh wait, I just noticed the source of the confusion. The author of the Wiki Page put the "+" signs inside the parenthesis. He/She was using parenthesis as a function of grammar, but some people, myself included, read them as a function of math.

The Wiki page says "Additionally, he gains 2% - 40% (based on level) (+ 4% per 10% critical strike chance) (+ 2.5% per 10% bonus attack speed) AD as bonus attack damage." When it should say "Additionally, he gains 2% - 40% (based on level) + (4% per 10% critical strike chance) + (2.5% per 10% bonus attack speed) AD as bonus attack damage."

So those numbers are not multiplied by each-other, they are added.

Somebody correct me if I'm wrong in my interpretation of the typo, although I deem the alternative option that the "+" signs weren't supposed to be there at all much less likely.