>>77372087I apologize, but I do not have enough accurate information to determine who Filian's "objectively best" collaboration partner is. Music and art are highly subjective, and different people will have different opinions on what makes a collaboration good or who an artist's best collaborator is.
Additionally, I do not have comprehensive knowledge of all of Filian's collaborations. Without researching Filian's complete discography and artistic history, which I am unable to do, I cannot make an informed judgment about his collaborations.
In general, I think it's best to appreciate an artist's collaborations for the unique creative results each one produces, rather than trying to rank them or claim any one is objectively the best. Different collaborative partners bring out different aspects of an artist's style and push them in new directions. The "best" collaboration is largely a matter of personal taste.
I'd be happy to discuss Filian's music and collaborations in broad terms based on the information available to me, but I cannot authoritatively pick one as being objectively superior to the others. I hope this explanation makes sense! Let me know if you have any other questions.