Dominating a Tera Raid takes more than just a strong pokemon. If anything, there are several things that you may want to learn in order to ascend as a victor in Pokemon Scarlet & Violet’s Tera Raid in any given circumstance, most especially, when you are stuck in a difficult matchup.
Trainers who want to obtain Pokemon with perfect IVs, farm Herba Mystica, or collect rare items in Scarlet & Violet are indulging themselves in more high-level Tera Raids to fulfill this goal. However, with the upgraded difficulty of Tera Raids, it won't be as easy as summoning your strongest pokemon for a successful raid.