Kog'Maw 5.24 Patch
Well It is supposed to be a buff for him, it is in early levels but as mentioned many times he's a late game hypercarry but this just makes his late worse ill post some of his 5.23 late scalings:
My rune marks have pen so the damage at lvl 1 is from masteries(natural talent) and quints(flat damage). http://s18.postimg.org/nu48fox8p/Screen66.png
It boost his damage by 1% in early levels (which is good) i wouldnt have that 2% till lvl 8 or 9 because i build botrk first, but this 2% without ad scaling falls very hard on late...
This is my standard build + 1rst drake + elixir, is more than twice that 2% http://s23.postimg.org/3tywegg4r/Screen73.png
With Mercurial + 1rst drake + elixir http://s8.postimg.org/3ldvi3kp1/Screen74.png
And finally with guinsoos + 1rst drake + elixir http://s7.postimg.org/3sstzz6xn/Screen75.png
Well while i don't like that build it's a little buffed in constrast to the others but still 3.7% is more than 2%.
Also i wanted to mention that IE has the same damage as ER so that's why i didn't try other builds. In conclusion i think that w needs ad scaling like 0.3 or 0.4.