Opinions on Vladimirs keystones and summoners

I have been struggling to find out which keystone and summoners to use on Vladimir (specifically in the mid lane). First off ill start by explaining Masteries/keystones, Personally i have been using deathfire touch for weeks and i find it to perform better than stormraiders not just because of the keystone but because of the percent based magic pen you can attain which is very useful against anyone building MR how ever you do miss out on the 45% Cdr which in my opinion doesn't matter for 2 reasons, your Q and E's cooldown are so low to the point that it's not even reducing by quarter of a second, the only thing it really affects is your R and W and very recently vlads most common Masteries in Diamond - Challenger ranked games (according to champ.gg) is precision and stormraiders not 45% + stormraiders so to be honest alot of people are going stormraiders and pen so i believe if your gonna go precision+stormraiders you may as well go Deathfire touch. And now for the SummonerSpell, ive seen most people go flash +Ghost which to be honest is fine but i normally go flash +Ignite for 2 reasons, the first reason being most of the kills i attain pre 10 minutes is igniting people to the point that they complain about them dying to ingnite too much in /all chat, and the 2nd reason being is ignite's damage is increased by hemo-plague so you can pick up a very easy kill with little to no effort the instant you turn level 6 in lane, but those are just my opinion if you'd like any extra information on S-spells and mastery winrates check the link that is provided above and give me your personal opinion on what is the best keystone/S-spells, any opinion or criticism is welcome as this post is supposed to help me improve on vladimir and anyone else asking them self the same question