1. 1050 resi in SoloQ? For what rating, 1900 against people who never played against Fdk and dont know how squishy it is xD. Any random TSG above 2k will just sit on you till you drop dead in 1 min max.
2. It is better then useless Acclimation which I never saw any top Fdk uses (10 /58/3 most common build or shifting blood points toward unholy for shorter grip). Also it is essential when you have short period of time to burst ( example pala stun) and you need every KM proc you can get. (finishing macro)
3. You forgot passive 256 ap from normal DV which makes it 1471 ap (almost the same) but you have 256 AP always and not on proc so it is obviously better while armor penet passive from STS is useless for Fdk.