how do i transfer from my ipad to my new ipad air2

Yes, you can. If you back up onto iTunes, back up your device. then unplug it and set it aside. Plug your new one into your computer. As you set it up you'll have the choice to set up as new or restore from the backup of the one you just made. Choose that and your new one will be a near clone of your old one.

do you normally sync to a computer via iTunes or do you backup to the cloud?

Try reading this and see if it helps. It gives instructions for both iCloud and iTunes

Transfer content from an iPhone, iPad, or iPod touch to a new device - Apple Support