A321 Captain reported an engine compressor stall event in cruise. After completing the QRH procedure; the crew continued to the destination airport with the affected engine at idle power.

Narrative

Prior to push back; First Officer (FO) and I 'chair flew' the new SOPs to include actions/call outs for Engine Loss at V1 and CAT 1 ILS and Engine Out Approach/Landing and Go Arounds. This significantly reduced our workload in flight and reduced the number of errors committed during the ensuing event given the otherwise lack of training on the new SOPs.Climbing through 17;000 ft. we heard a loud bang and felt a jolt to the aircraft followed by an ENG 2 STALL ECAM. The stall cleared itself in less than 5 seconds. Captain (CA)/Pilot Monitoring (PM) referenced the QRH procedure. A Pilot riding in the cabin informed us that a visual flame was observed in the #2 engine associated with the compressor stall; but no external damage was observable. Engine was returned to normal operation following completion of the QRH procedure. At 35;000 ft.; approaching Top of Descent; the #2 engine experienced a second series of stalls. The stalls included an ECAM ENG 2 STALL message; erratic EPR indications; audible banging; and visual flames as reported by the Pilot riding in the cabin. The FO/Pilot Flying (PF) immediately retarded the thrust lever and the stall cleared. CA/PM executed QRH procedure; and we elected to operate the #2 engine at idle power for the duration of the flight. We [requested priority handling] with Center and requested a descent and expedited approach to ZZZ. 'Non-routine landing considerations' were reviewed and a precautionary landing was conducted to XXC. Fire/safety personnel inspected the aircraft after landing and indicated no visible damage. We taxied to the Gate.Landing with reduced thrust after running the QRH procedure is somewhat confusing. While not technically a single engine approach; we treated it as such (since it could turn into one at any second) and it would be helpful if the Engine Stall checklist would direct us to review 'Approach Considerations' on the QRH. This section is difficult to find in the heat of battle.