Originally Posted by GSSB Lunaspike
Kog has 710 range with Bioarcane barrage.
I'm not saying it is a good item, but consider what you just said. If they are close enough for him to hit them then they are too close. So when exactly is he supposed to even deal damage?
You're missing the main idea.
In general, if you can actually hit opponents at once with Runaan's, THEN they will be too close. The reach of his two extra attacks won't go beyond your target, it will hit anything within range of your actual AA and lower.
In the nearly impossible to achieve situation where all 3 targets are lined up in such a way that all 3 are at your max range, Runaan's is awesome. But that almost never happens. In order to hit 3 enemy champions, 1-2 of your targets must be past the range of your chosen target.
The problem is obvious.
1) You're play ADC wrong. The ADC is supposed to hit the safest target and DPS, to achieve what I described above, you're bypassing the safest target just to hit someone behind the two other enemy champions. Who will most definitely jump onto you and insta-gib you.
2) If you play ADC correctly, that means you will be hitting the most optimal target, the one you are safest attacking, which is almost always the closest target. Even if you run up a little just to pick a a 1 hp target running away, that hardly makes use of Runaan's effect.