Larian Studios Forums Divinity - Original Sin Divinity Original Sin - Help/Tips/Tricks Royal Guard Talisman

How open chest with Royal Guard Talisman without breaking chest (Hiberheim near wishing well)
I tried Stealth \ Invisible\Teleport near the statues without detect (green light) and use Barrels of oil and characters on 4 triggers
Character say like "I hear something triggered left\right of here "
But nothing from both side....

So need 4 characters:
1 Right (near door)
2 Left (near door)
3 Right (far)
4 Left (far)

Guards do not have to raise the alarm