Personally, I would rewrite this choice like this:
*choice
#Run (If you run you have to drop something valuable (-5 Skill or items)
*set agility -5
*goto escapec3
#Hide in mine (20 Intelligence)
*if intelligence > 19
You stay quiet enough to where they don't notice.
*if (power = "Water")
*goto escapec2
*if power != "Water"
[i] Relationship with Amanzi increases [/i]
*set Amanzi +10
*goto escapec2
*if intelligence < 20
They hear you and kill you before you could explain
*goto realcheckpoint2
#Climb the tree (20 Agility)
*if agility > 19
You stay quiet enough to where they don't notice.
*if (power = "Water")
*goto escapec2.1
*if power != "Water"
[i] Relationship with Amanzi increases [/i]
*set Amanzi +10
*goto escapec2.1
*if agility < 20
*if (power != "Air")
Anemos wind spirits see you|They kill you before you can explain
*if (power = "Air")
Kasai fire spirits see you|They kill you before you can explain
*goto realcheckpoint2
Edited to account for not meeting Ananzi if you have water power.