Can I control the order of keyboard layouts in the system menu?
Since you're using more than two input sources you'd be better off configuring a specific shortcut for each input source.

Without knowing the exact version of macOS you're running, there are a number of tools you could use to achieve this:


IMEShortcuts
MLSwitcher2
Karabiner


My suggestion would be to create the same shortcut and use digits (i.e. 1, 2, 3, and 4) to differentiate them.