Jhin's superweapon!
I've received a lot criticism for this suggestion, but the math says that there is one item that is VERY strong on Jhin and in my opinion it is very underrated.
Guinsoo's
Rageblade!
I imagine that I have already lost a few people by this point. For those of you who are at least willing to humor me, thank you.
CON
So the obvious CON for the effectiveness of this item is that it relies on auto attacking 8 times in a relatively short time and Jhin only has 4 shots before he needs to wait 2.5 seconds (I believe) before he is able to attack again. That is huge, I definitely agree, but lets look at the PROs
PROs
Guinsoo's Rageblade on purchase, with 0 stacks is uneventful. 30 attack damage and 40 ability power. However, as a champion who is able to utilize both stats effectively, I like it. Also, the Rageblade is a very cheap item compared to other completed items.
At a single stack +3 attack damage, +4 ability power, and +8% attack speed means next to nothing. An assumption that I have not confirmed as of yet is that Jhin's passive does not add the 2.5% AD until you have 10% bonus attack speed, so the first stack doesn't give you anything. However, on the second stack you now have a total of 16% bonus attack speed, so it does add at least 2.5% AD. At full stacks it gives 64% bonus attack speed, which is 15% AD. The item alone only has 54 AD, so with Jhin's passive adding 15% from the attack speed alone, 54 + 0.15(54) = 54 + 8.1 = 62.1 AD
This is really not impressive, but keep in mind that this is not taking into consideration any of the increase from your base AD, runes, masteries, other items, or in match buffs.
When you compare a fully stacked Rageblade with any other item in the game currently, no other item gives as much bonus attack speed. The next largest amount of attack speed from a single item is 50%, but none of those items give any attack damage. The next best item that gives both attack speed and attack damage is Blade of the Ruined King which gives 40% attack speed and 25 AD. That would give a bonus 10% bonus total AD. This could be worth it ultimately, but it is also 900 gold more expensive. In my opinion, in order to make either of these items effective, you really need to have as much total AD before the passive effect as possible. I would like to do some item comparisons, including these two, in order to support these points.
For these comparisons I want to assume that Jhin has 100 AD from base growth stats, runes, and masteries, and no other items to enhance his passive aside from the ones mentioned in a given scenario.
( 100 base AD + 30 item AD + 24 stacked AD ) x 1.15 ( 64% stacked attack speed) = 177.1 AD
( 100 base AD + 25 item AD ) x 1.10 (40% static attack speed = 137.5
That isn't even close to me. Even without any stacks Rageblade would be 7.5 AD less than BoRK. At 2 stacks it is 1.9 AD stronger. Now lets look at some of the common items that offer no attack damage, but offer attack speed and critical strike chance.
( 100 base AD + 0 item AD ) x 1.19.5 ( 12% from 30% bonus attack speed + 7.5% from 30% critical strike chance) = 119.5 AD
These stats actually come out to be the same as Rapid Firecannon.
( 100 base AD + 0 item AD ) x 123.5 ( 16% from 40% bonus attack speed + 7.5% from 30% critical strike chance ) = 123.5 AD
These stats come out to be the same as Runaan's Hurricane.
These items obviously don't really stack up by themselves but they do offer a greater %AD boost when placed with additional items that grant added AD. However, any single one of these items could be replaced with Rageblade in any combination of items to net a larger overall attack damage total at maximum stacks.
For example,
Lets try to keep it simple. ( even though he would likely be level 18 I'm still going to assume he has only 100 AD. Just assume that these other stats would remain the same for both builds. )
( 100 base AD + 375 item AD ) x 1.23.5 = 584.73 AD
*** again, I understand that in a real game it would be higher than this ***
Now if you replace Phantom Dancer with Guinsoo's Rageblade
With 0 stacks he will have a flat AD total of 515 AD At 8 stacks ( 100 base AD + 429 item AD ) x 1.15 = 608.35 AD
Now, there is a rather obvious exception to all I have been saying so far.
Infinity Edge does offer a greater amount of base AD and does not require any stacking effects in order to gain additional AD, but only offers an 8% increase in total AD. To use the same math as before...
( 100 base AD + 65 item AD ) x 1.08 = 178.2 AD
So yes, on it's own it does offer a more consistent amount of damage, as well as the additional damage guaranteed from the item's passive.
However, the decrease in % AD stat does not work out as significantly when used in the full build example.
( 100 AD + 440 item AD ) x 1.08 = 583.2 AD
HOWEVER! Lets say you decided to go with something like this, ..

With 0 stacks ( 100 base AD + 355 Item AD ) x 1.40 ( 40% from 100% critical strike chance) = 637 AD With full stacks ( 100 base AD + 379 base AD ) x 1.55 ( 40% from 100% crit strike + 15% from 64% bonus attack speed) = 742.45 AD
Just for grins, a sixth IE would not increase the passive effect at all, but your total AD with this formula would be 686 AD
So all of this and I haven't even mentioned the AP, or the AOE passive.
My theory on this item with Jhin doesn't make you into a mage or an assassin, but instead it makes you into a freight train. You will pack a decent punch when you start a fight, but once you reach full stacks, you will cut a path to the nexus.
I'm sure there are other points, but this is plenty long enough. I am even getting tired of talking about it, and I am confident that few people will actually read this, so if you have actually read this far, .. comment with your favorite color. lol
, which I hadn't mentioned before, but I honestly don't think this is a great item anymore. Only two of them give less than 10% more attack speed than critical strike chance. There are 8 items that give attack speed that do not give critical strike chance. Rageblade gives the most of these that also gives a substantial amount of attack damage.
damage+lifesteal+spellvamp+bleed out slower so I can lifesteal back up. Made from cheep components, which is good if I am falling behind
? it has both Ad and Ap. and a slow. might be a good pick with something like
75 AD
75 AD
75 AD
All of these only give a flat addition in attack damage and do not provide any means of increasing the overall attack damage for themselves and other AD providing items.