Crouch jump down grab to get over the first two pillars. For the third pillar, crouch jump to time a damage boost on the Skultera. Right after taking damage, switch to a down grab to land on top of the pillar. This is made easier by taking the damage boost while Morphed.

Requires:

{
  "notable": "Suitless Damage Boost Underwater Pillar"
}
"canSuitlessMaridia"
"canTrickyJump"
"canNeutralDamageBoost"
"h_underwaterCrouchJump"
{
  "or": [
    {
      "and": [
        "canDownGrab",
        {
          "noBlueSuit": {}
        }
      ]
    },
    "canMidAirMorph"
  ]
}
{
  "enemyDamage": {
    "enemy": "Skultera",
    "type": "contact",
    "hits": 1
  }
}