This deck wins late with Corrupt and Drain Life. Pestilence can be a win-con, especially with Treacherous Link and Circle of Affliction, but actually it’s main role is to sweep the board of creatures on opponent’s turn. Counterspells are therefore a bigger threat than enchantment removal.

Duress and Stupor target counterspells. Fog of Gnats, Cuombajj Witches and Caltrops help survive against aggro. Kyren Archive and Mind Ravels help with topdecking.

It should be noted that Pestilence deals damage one by one which isn’t always enough. Crypt Rats and especially Bane of the Living would be good additions. Dimir House Guard could be considered.