not enough damage? rofl you should try this combo ...
Q -> E -> R -> Ignite -> W -> Q -> E
dont need deathcap asap i can promise that

Also about the build ... zhonyas is way better imo because it is basically another pool and allows you to repeat your cycle again and you will have your pool after you go thru this combo so it would end up looking like this
Q -> E -> R -> Ignite -> W -> Q -> E -> Zhonyas -> Q -> E -> W -> Q -> E

good guide overall, only problem is, after playing vladimir a lot ive learned you must get deathcap as your 1st or 2nd item, without it early you won't do any damage, so i would get it earlier, even before rylai because until you get it, your passive gives you enough health to do.

Maybe you should mention some more points that are important for the guide, for instance why you chose those items, those masteries, those runes, how you play Vlad etc... I think it is a good build but you should explain our fellow Vlad players some more about the champ.