This strategy section is empty or incomplete. See the strategy guidelines for more information on how to write strategy sections. The editor who added this notice elaborates: Mention use cases, best tower choices (e.g. wof and gwen), and viability in each game mode (seems really good in timeattack)
Royal Treatment enables a carry with defenses that pop Purple. Most of its best candidates are only weak to Purples and tend to have high pierce, like Wall of Fire, Gwendolin, Dragon's Breath, and Archmage.
1-2-0 Wall of Fire now does guaranteed DPS against anything that enters it.
In Time Attack, its best use cases are Wizard and Gwendolin, as early-to-mid rounds become more manageable by not getting blocked by Purples. Hence, rounds can be pushed to round 25 and later with a solo Wall of Fire or level 3 Gwen.
In Least Tiers, it may enable combinations that are not possible without this relic, such as Dragon's Breath, Summon Phoenix, Wizard Lord Phoenix, and Archmage.
Gwendolin can solo Regular Least Cash tiles when given Relics to deal with the MOABs, enough leeway for her Cocktail of Fire (e.g. good intersections), and also Camo detection on some maps. This lets her achieve a lower score than Rosalia.