Hello,
In this case, it will be a simple solution to just make 1 LUN to hold the backup data. Ideally, the raid group of this LUN can have same number of disk and RAID format as production site.
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You can try if enable mxpio like that stmsboot -e -D fp This will create pesudo driver for fibre device only. If just using stmsboot -e, will have chance to change the device path of your system...
It depends what applications are planning to run on the ZFS. And it will be better if the pool can be formed in mirror / raidz state instead of just 1 LUN or stripe set of pool.