Bluetooth between iPad Mini and Mac Pro keeps dropping
There is no need to pair your iPad to your Mac. This feature is part of Handoff, which is part of the Continuity family of features.

In order for this to work, you need to turn the feature on, on all your devices:
from Apple:


Each device is signed in to iCloud with the same Apple ID.
Each device has Bluetooth turned on.
Each Mac, iPhone, iPad, or iPod touch has Wi-Fi turned on.
Each device has Handoff turned on:
Mac: Choose Apple () menu > System Preferences, then click General. Select “Allow Handoff between this Mac and your iCloud devices.”
Each device has Handoff turned on:
Mac: Choose Apple () menu > System Preferences, then click General. Select “Allow Handoff between this Mac and your iCloud devices.”
iPhone, iPad, iPod touch: Go to Settings > General > Handoff, then turn on Handoff.


Finally, you need to ensure your device supports the feature. For Universal Clipboard, your Mac should be: MacBook (Early 2015 or newer); MacBook Pro (2012 or newer); MacBook Air (2012 or newer;  Mac mini (2012 or newer); iMac (2012 or newer); iMac Pro; Mac Pro (Late 2013).

For iDevices: iPhone 5 or newer; iPad Pro; iPad (4th generation) or newer; iPad Air or newer; iPad mini 2 or newer; iPod touch (6th generation) or newer.

If you don't have one of these devices the features won't work.

For more see Apple support: https://support.apple.com/en-us/HT204689