Top chase cards in Crown Zenith include Giratina VSTAR, Mewtwo VSTAR, Arceus VSTAR and the Dialga VSTAR and Palkia VSTAR
The RBI is enough, and the Special Summon effect is mainly to bring out acid and send it to the opponent
FromTheShire: A deathtouching blocker that returns straight to the battlefield over and over is super useful, especially since the trigger is something you're going to be doing a bunch anyway
All the effects of these cards, however, trigger only on play, thus the corner stone of your strategy should actually be the Floodborn Scrooge McDuck, Cavern Prospector that has a passive ability which allows the Player to put a card under every Character with Boost right after they are played
Beetle-Headed Merchants Gray Merchant of Alphabet Gray Merchant of Asphodel Merchant Raiders Merchant Scroll Merchant Ship Merchant of Many Hats Merchant of Secrets Merchant of Truth Merchant of Venom Merchant of the Vale Merchant of the Vale Merchant's Dockhand O'aka, Traveling Merchant Provisions Merchant Qiqirn Merchant Renari, Merchant of Marvels Reputable Merchant Skullport Merchant Stiltzkin, Moogle Merchant Talas Merchant The Cabbage Merchant Unlucky Cabbage Merchant Vodalian Merchant