The presence of the Yapping Maws causes Samus to immediately lose i-frames while moving; so the damage boosts must be chained directly from one to the next. This can be done by holding jump the entire time, and releasing left at the end of each boost, to fall straight down for the next boost, facing right the whole time. At the end of the final boost, Samus should be out of range of the Yapping Maws, and so should have i-frames to jump normally out of the lava.

Requires:

{
  "haveBlueSuit": {}
}
{
  "notable": "Blue Suit Rapid Suitless Damage Boosts"
}
"canBlueSuitSpikeJump"
{
  "tech": "canHorizontalDamageBoost"
}
{
  "heatFrames": 340
}
{
  "spikeHits": 6
}
{
  "lavaFrames": 70
}