I can imagine having it both ways with 4 Factories if you just run 1 or 2 Displacers. It's not like they get better in multiples, and if you're running the full 4 Matter Reshaper, the body doesn't matter, and the curve considerations are already taken care of.

Like I can imagine running 4 of all the good creatures + 2 Displacer with 2 Petals, 4 Cavern, 2 Karakas, and 1-2 other white sources of your choice. You have plenty to do with your mana with the addition of Factories and there is minimal risk that Displacer just gets stuck in your hand any worse than the standard 1-2 six-drops normally do - waiting for W mana for Displacer is similar to waiting for that fourth/fifth land for Endbringer.