A: No. The OTA loophole is unique to the iPad 2 and original iPad Mini (1st gen). iPad 3/4 must stay on 9.3.5 or use coolbooter.
A: No, you do not! This is the main advantage of downgrading to 8.4.1. Because Apple still signs the OTA update for this version, all of the methods described above will work without needing you to have previously saved your device's unique blobs. downgrade ipad 2 ios 9.3.5 to 8.4.1
Navigate to the following directory: /System/Library/CoreServices downgrade ipad 2 ios 9.3.5 to 8.4.1
Here's a high-level overview to help you decide which approach is right for you. downgrade ipad 2 ios 9.3.5 to 8.4.1