As soon as you run another window manager instead of xfwm4 you will lose your support. You will receive no help on the mailing list, Matrix channel #xfce, forum or issue tracker as long as you cannot reproduce the problem with xfwm4.
Using another Window Manager
Xfce works nicely together with other window managers instead of xfwm4.
General Configuration
Replacing xfwm4 with the window manager of your choice is quite easy. Run
command_of_your_wm --replace
and save your session. The change will be applied on the fly.
Or, if the WM of your choice does not support the --replace switch or you do not want saved sessions, use
xfconf-query -c xfce4-session -p /sessions/Failsafe/Client0_Command -n -a -t string -s "command_of_your_wm"
This needs a restart of your session.
To make the change on a global scope for all users which do not have this setting already in there private xfce configuration, alter
/etc/xdg/xfce4/xfconf/xfce-perchannel-xml/xfce4-session.xml
and change the appropriate value.
Xfwm4 integrates its own compositor for hardware acceleration. You have to provide your own compositor if your alternate window manager doesn't provide this feature or you can't use things like real transparency, tear-free playback, window previews or drop shadows.
Compiz
Just don't use it. It is outdated. Upstream is dead. Canonical took over the development, but only for Unity, so don't expect proper packages outside of *buntu.