Hello Michael Buchelly,
As per discussion with Ruckus Field staff in my region, they are of the opinion that upgrade path from 7.1.0.0.57 shall be in this order and should work --> 7.1.0.0.57 --> 8.0.2.0.7 --> 8.1.1.0.12 --> 8.2.1.0.32 --> 8.2.2.0.7
Also usually it is highly advisable that sequence in which firmware is available on the support site shall be ok to be followed as upgrade path. In addition, refer to release notes and if still in doubt - talk to support folks.
i hope this helps.
PS: take ZD backup at every stage of upgrade.