Its Quaking Punch attack only does 30 damage, after all
Playing one big dragon for free post-combat is cool, but if you can keep your hand full, which you should be able to do with Garruk's Uprising, Rishkar's Expertise, and Greater Good, you can dump lots of medium spells rather than one big one
Overall, Amethyst, Ruby, and Steel are more focused on attacking while Amber, Emerald, and Sapphire are more supportive, but each can be used to make interesting combinations and people can experiment with seeing what strategies work with their personal play style
The best blades I have found for small details are X-Acto brand #11 Light-Duty blades
Ideally I wont accidentally forget to include some obvious staple, but the first draft of this article didso Im not holding my breath