The preferred way is to leverage External Dynamic List (EDLs)
If the threat feeds from the MSP are formatted in a text file, there is a high probability one could just ingest them without using MindMeld (as OtakarKlier stated), but MindMeld will assist in normalizing and removing duplicates IOCs from various threat feeds. Also Cortex XSOAR also has the ability process IoC and create EDLs as well with their Threat Intel Management Module.
Hope this Helps.
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