Wait, who the fk builds Deadman's on an AP mid? Or SV? No, that is just wrong.
Your build will vary based on champ, but in general you can expect it to see something like:
(or
)
One of:
(Later to be GA or ZZ'Rot, most likely GA)
One of:
And a situational pick, possibly from one of the above sections.
You probably have 15AP from Quints, 15AP @18 if you took Natural Talent (offense tree), and you may have AP, MR, or CDR blues (going to assume not AP for simplicity).
Here's what it looks like on Brand:
https://i.gyazo.com/56673ba4ab980efa87c483f2ad2fe55e.png
(AP goes up to 550 if you use scaling AP blues, btw)
You honestly are going to tell me he does "jack all damage" with this set up? I don't think so. You'd be wrong if you did.