Won't make much sense, XCache is not available for PHP 7.0+ (even the official project homepage is no longer available ...) and XenForo 2.2 does require at least PHP 7.0
Zend Opcache is included in vanilla PHP releases and should be used if possible.
The file based cache is almost as fast as memcached and Redis, so long the site is busy enough for the file contents stay in Linux's disk caching. Setup is in the Xenforo docs and worth doing.