Stormrazor has way too good of stats for its passive.
Compared to its counterpart, Blade of the Ruined King, Stormrazor has considerably better base stats.
3200 Gold
40 AD
25% Attack Speed
12% Lifesteal
89% Gold Efficient without the passive.
2800 Gold
60 AD
35% Attack Speed
106% Gold Efficient without the passive.
While Blade of the Ruined king has more stats to offer, the values are modest in comparison, which is much healthier design. AD and attack speed on one item is a dangerous combination due to how well these stats synergize, and Stormrazor offers high values for both of these. It gives more AD than Lethality items, and the same attack speed of Static Shiv. This makes Stormrazor a low-cost, efficient stat stick, with an incredibly powerful passive and to put simply, is bad design.
Stat Sticks should follow the these general rules: Provides either high value, but narrow focused values or a wide range of low value stats. Slot / gold efficiency is indirectly proportional to active / passive effects. High value stats come with high price tags.
Good examples of this are:
Offers a wide variety of low value stats, and a powerful active, but has the highest item price in the game.
Offers incredibly high value stats, but are narrow focused, and the passive is on the weaker side and comes with a high price tag.
Offers great stats and better scaling, but cannot function on its own, and comes with a high price tag.
The OG Stat Stick, offers incredibly good stats for the price, but those stats aren't granted upon item completion and take 10 minutes to come into play. Additionally its passive offers little use outside of laning phase.
Stormrazor needs to follow these rules, and the most obvious solution is to nerf its attack speed. There's no reason for it to offer such high attack speed (it virtually triples the attack speed of the sole attack speed item in its recipe) as it should focus more on damage, considering what items it is generally paired with.
Attack Speed: 35% -> 20%
This brings it in line with other items, and stops it from outshining Blade of the Ruined king as a rush item for marksmen.

and you have to be ready to fight them from the get go. Botrk makes build-pathing against them much easier to handle since one of them will most likely be snowballing (since you picked a marksman that isn't Graves). This is only changes if you're running a scumbag duo and/or doing the funnel strat.
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