If you possess the original SHSH blobs for your specific iPad mini, you can perform a full restore. Verified Tools: Legacy iOS Kit is the modern standard for 32-bit device restores.
While it can restore iPad 2 devices to iOS 6 without blobs, for the iPad mini 1, it primarily supports downgrading to (which is signed via OTA) or performing tethered restores to iOS 6. downgrade ipad mini to ios 6 verified
because Apple still signs it for OTA updates on the iPad mini 1. Verification If you possess the original SHSH blobs for