Against vladimir, Try not to group too closely as it will allow Vladimir to get a good Ultimate e off. By splitting up slightly, Vladimir will have to use his Ultimate e on fewer targets. 

Expect Vladimir to flank from the side in team fights. Ward your flanks so you spot him before he is able to get on top of your team.

If you haven’t already, you need healing reduction on your carries to reduce his healing and sustain in the team fight. Against vladimir, Try not to group too closely as this will allow Vladimir to get a good Ultimate e Off. By separating slightly, Vladimir will have to use his Ultimate e on fewer targets. Expect Vladimir to flank on the side in the team fights. Watch your flanks so that you find him before he is able to climb to the top of your team. If you don't already have, you need the reduction of healing on your portages to reduce his healing and support in the team fight.