What Is A Play Booster
Try to use your characters to block your opponents high-lore characters from staying out in the early game even if you need to trade (lose yours to take out theirs)
"Final Fantasy Commander Decks Revealed, Feature Cloud, Tidus, and More"

First up, here's a rank of the legendary creatures whose reprints are a price increase, sorted roughly by current price of the original printing: Thrasios, Triton HeroThrasios, Triton Hero Urza, Lord High ArtificerUrza, Lord High Artificer Yawgmoth, Thran PhysicianYawgmoth, Thran Physician Najeela, the Blade-BlossomNajeela, the Blade-Blossom Atraxa, Grand UnifierAtraxa, Grand Unifier Isshin, Two Heavens as OneIsshin, Two Heavens as One Vial Smasher the FierceVial Smasher the Fierce Yuriko, the Tiger's ShadowYuriko, the Tiger's Shadow Kenrith, the Returned KingKenrith, the Returned King Teferi, Mage of ZhalfirTeferi, Mage of Zhalfir K'rrik, Son of YawgmothK'rrik, Son of Yawgmoth Syr Konrad, the GrimSyr Konrad, the Grim Traxos, Scourge of KroogTraxos, Scourge of Kroog Captain Lannery StormCaptain Lannery Storm Danitha Capashen, ParagonDanitha Capashen, Paragon Fynn, the FangbearerFynn, the Fangbearer And the following is the remaining 20 legendary creatures, again sorted roughly by the price of the original printing

Since job select creates a HeroHero, and auto attaches the Equipment to it, the Black Mage's RodBlack Mage's Rod turns that Hero into a makeshift pinger
It's all here