Requires:

{"or": [
  {"and": [
    {"heatFrames": 150},
    {"lavaFrames": 40}
  ]},
  {"and": [
    "Gravity",
    {"heatFrames": 140},
    {"lavaFrames": 30}
  ]}
]}

Dev note: This assumes that the Geruta closest to the item has already been killed.