In my experience, the hardest Visionary to kill in Deathloop is Wenjie. The self-cloning scientist is married to her work, so you'll need to jump through some hoops to get her to Aleksis' party if you're hoping to kill all Visionaries in a single loop. Luckily, though the process is rather convoluted, it's something you'll need to perform just once. Follow these steps to get Wenjie to the party, then she'll be yours for the kill.
Wenjie hangs out at The Complex in the afternoon, where she spends
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