If possible, no strollers in the event itself as aisles might be crowded and difficult to get through with larger strollers
The linear way to boost Vivi's power is to cast noncreature spells, but there are plenty of other ways to raise its power like Clout of the Dominus and Naru Meha, Master Wizard
Make sure you have inkable cards in your opening hand, too
Gyarados, Blastoise ex, Articuno ex, and Palkia ex can all thrive with Mistys energy boost, allowing them to hit hard right when they enter the fray
Kaito, Cunning Infiltrator Three-mana planeswalkers are often important in Standard environments
If WotC wants to expand the cycle further, I expect well see some of Drizzts most famous and enduring foes as well: magic-hoarding drow mercenary Jarlaxle, the ambitious assassin and duelist Artemis Entreri, the possessed crystal shard Crenshinibon, and the great orc king Obould Many-Arrows could fill out some of the black-based color combinations