I only have a 30" monitor so I just split it as 2×3. The bigger problem I'm having is that I prefer to be able to slot the windows without the mouse, but Super+Arrow sticks to Mint Cinnamon's 2×2 grid.

Then my next preferred method is solely using both mouse buttons, but for some reason, it's now getting interfered with by the context menu showing up when I press the right mouse button; it used to not do that before, so I wonder if some other program is usurping my controls, even though I can't figure out what that may be... I may have to go with a left-handed modified key, my least preferred approach...