Desert Duel Garu: Trial 50 | Sorcerer's Trials 15 | Nu: Carnival gameplay

My recommendation: Place allies with paralysis immunity in positions 2 & 4. You won't worry about Garu affecting them later in the fight when his strike is too powerful for a single guardian.
Reserve your ultimate skills for turns 6 and 15 (unless you can ensure the cooldown in time). They're required in order to protect your center position.
💎 HIGHLIGHTS
00:16 First turn strike on position 3. Isn't Garu a little cutie? I love him
00:54 Garu casts Master's Instructions. On the next turn, guard positions 1 & 5 to protect them from Shackled Bullet, an attack that will both silence them and interrupt their ultimate skill cooldown
1:18 Turn 5. Guard positions 2 and 4, OR use your guardian's ultimate skill on this turn to protect them from Garu's attack. If 2 & 4 have paralysis immunity, you don't have to use your guardian here
1:48 Garu casts Protect the Body. Turn 7 begins. If you used your guardian on turn 5, they're still paralyzed. Unleash all four available ultimate skills to protect them from the upcoming attack. (If your guardian is available, they can use their ult here too for additional protection.)
2:47 SSR Yakumo has a 3-turn cooldown, so I use his ultimate skill here since it'll be ready again by turn 15
3:10 Garu casts Master's Instructions. On the next turn, guard positions 1 & 5 to protect them from Shackled Bullet
3:29 We're switching up the tactic from earlier. Instead of using Morvay to guard 2 & 4 on this next turn, which will get him killed (the strike is HUGE), we guard positions 2 and 4. They are both paralysis immune, so they won't be affected, just injured. Whoever takes this hit MUST have a good amount of HP. Yakumo loses most of his, but he'll heal up fine.
4:05 Time to Protect the Body again! Unleash all ultimate skills to protect position 3. Morvay isn't paralyzed this time around, so he gets in on the action.
4:35 Aster deals the last blow and the fight ends
4:41 We celebrate with SSR Yakumo & appreciate Manaka Sawa's voice
⚔️ TEAM BUILD
SSR Chocolate Liquor Yakumo (striker)
SR Olivine (booster + paralysis immunity)
SR Morvay (guardian)
SR Yakumo (healer + paralysis immunity)
SSR Aster (saboteur)
Everyone but Morvay is maxed out. He's a 4-star with potential 10. Someday I'll give him that 5th star but he doesn't come out to play much.
⭐ STAR CONDITIONS
Clear with at least one Guardian on your team. No one can die, and you have 20 turns.