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
If you're doing well, your opponents will all probably have less life than you, in which case you get a bunch of tokens every turn
Cards like Reconnaissance Mission and Grazilaxx, Illithid Scholar are good options, and a lot of the Mirran swords like Sword of Feast and Famine work well
This is a pretty great creature for us that will boost the mid-game creature rollout
All planeswalker loyalty abilities count as activated abilities
White creatures also tend to have lots of evergreen abilities like flying, first strike, lifelink, and more