I decided to revisit an old deck build that i enjoyed at a time. As the title suggest, the deck is derived from Waldemar. I suggest you visit the original deck for a more in-depth strategies.
The single copy of Cerebral Overwriter is in the deck to scare the runner. Simply use it to make your runner believe you are attempting to score a Mandatory Upgrades. Most of the time, it will scare the runner. Giving you ample time to score out an Upgrade.