Battle Conditions Forecast

Legends - Prot Ult (adjust your TP, especially with Armored). DR Resist in case you want to swap it out for anything.
Champs - Basic Ult Hooray! Boss Ult makes that a bit harder. Both EO and DR Resist so you have a bit more card freedom.
Plat - Prot Ult (adjust your TP, especially with armored).
Gold - Basic Ult with More Enemies...Double Hooray!!
Silver - Basic Ult Hooray!
Copper - Good luck!