A very thorough and well written tutorial!
For dragon builds I'd add a Harass/Hit&Run build with main purpose to get behind enemy lines cloaked (where Shamans, Warlocks and Devastators are most likely deployed) unleash AOE spells (Eye of the Patriarch, Pillar of Flame, Crippling Roar) or direct spells (Sabotage, Charm) and retreat with Bastion casted and Salvation in hand.
Sabre Dragon is a best base for this build as he has Soar (but this skill costs 5 research point so you can get it quickly) and Sabotage researched. Having a good balance between endurance and damage output which is `built` into Sabre... specie (?) also helps.
Tested only in three-act campaign with the aim to hit at 2-3 places simultaneously. Had a lot of fun with that dragon, but I think that an aware player with Support Dragon should be able to have his army pre-spreaded before engagement and be able to nullify effects with Restorations and Cleansing Charge. The edge lies in surprise and fighting in different places at once.
