Baldur's Gate 3 Githyanki Defeated in a turn (Solo Rogue)

Note: Caustic Brine no longer deals extra damage after patch 4.

Lone fighter can easily defeat multiple enemies in one hit but can we defeat Githyanki using a Rogue & short swords?
Strategy: Rogues have an action & two bonus actions so they do three attacks. Consume speed potion before combat & gain one more action. Which means 4 attacks. Add +25 wyvern poison's average damage to each attack & battle is finished. Even then damage is variable & enemies survive at one HP so this strategy came to mind.

Defeat Enemies with companions without taking any damage:
This is possible if RNG is favourable. Only two enemies are most troublesome in this battle.

Boosts used are Blurr,shield of faith & Bless which require concentration.
Mirror image does not require concentration. Two mirror image scrolls can be easily found in game. Minthara has one & one is sold by Merchant who is with Paladins of Tyr.
Strategy:
After boosts Lae'zel & Main character will go ahead while Gale & Shadowheart will stay behind.
This whole battle is different if your Rogue gets first turn.

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