I actually had all 3 arcades running at one point on a test site but there were too many clashes. So I stuck with the one I deem to be the best
You can run both IPBA and v3A together but you would need to make files changes to either the IPBA files or the v3A files; changing reference to arcade.php and /arcade/ to something else - most people changing the IPBA files would change all references to ibproarcade.php and /ibproarcade/ (if I remember correctly if you are editing the v3A files you only need to change references to arcade.php to something like v3arcade.php and can leave the folder as /arcade/)
Even then you might run into problems.
The arcade folder for v3A is only used to store gamedata folders from IPB type games.