Lel "professor cube"
feliks uses a method called reduction, basically what you do is you solve the first two centers by either using 1x2 bars or 1x3 bars, then you solve the next two center in the M slice the same way (for the most part) then you solve the last two centers simultaneously. After that, you pair up the edges with what is known as freeslice, where you pair up the edges without aligning the centers. You align them once you've solved 8 edges, and solve the last 4 in the E slice. Then you solve it like a 3x3.