Thoughts of possible experiments Bile does in SW
Turning Near-Humans and SW Human-Hybrids into Chaos Space Marines, New Men and mutated versions of New Men Primaris Astartes
Cloning powerful Force Users, even dead ones
Stealing the idea from the Death Spectres. Create female clones of powerful Force Users to have plenty of strong children to become Astartes. Abaddon would order Bile to do it. Traitor Legions and Red Corsairs would want it.
Inject Chaos-corrupted Midochlorians into Non-Force Users
Splicing DNA from multiple Xeno species to create Abominations. Splice DNA of Primarchs, Swarmload and Force Users
Experiment on the Vong and their Bio-tech
Find very diverse apprentices in SW and study the differences between them. Upgrade them and see how they use their new enhancements and Chaos gifts