Turi hits twice and Vlarga once. Lehasti, being grappled, takes a -2 to attacks, but the Debilitating Strike from Turi fortunately lowered the golem's AC enough that it's still a hit. The DR cushions a lot of the blows, but the golem is now significantly damaged.
Natala casts Cure Serious Wounds, healing Lehasti for
(3d8+8)[13] hp.
The golem maintains the grapple on Lehasti (+5 bonus as it's already grappling her)
(1d20+34)[40]
Regular grapple damage
(2d10+8)[26] plus grind damage
(2d10+12)[23]
End of round, Refl save DC18
(1d20+6)[17], if failed, falling damage
(4d6)[9] - fail. Both the Golem and Lehasti fall. The golem is protected by DR and takes no damage, as opposed to Lehasti.
Lehasti received
13 hp of healing, but took a total of
49 58 damage. She's still grappled, and prone at the bottom of the pit.