Hi Rykar Rin,
it seems that it’s better to use the “switch between windows from the same application” shortcut. according to this site it’s under alt + ` (the key above tab for most english keyboards) for ubuntu. If you use xfce4, it would be super + tab as default though (super is the linux name for the windows key). This was also described in this comment. If you should “get stuck” though, the approach described in this other comment worked for me too.
I also tried EVE-O Preview. The preview part worked in compatibility mode but the client switching didn’t properly. I described that in the comments there too. It would be nice, if you could try it too and give feedback there. More systems to test would probably help.