I'm going by the ones that are actually active.

Skallagrim: 
Turn 1- Seidhr Sense to find Erde's weakness.
Turn 2- Draws his sword and stabs Erde's core with little resistance from the titan.

Dou'far Klaast:
Turn 1- Withdraws his vibroblade and charges Erde.
Turn 2- Swings his blade repeatedly, cleaving through the earth that protects his core.
Turn 3- The core is exposed by the repeated slashes, it would take Erde one turn to close back up. Klaast cuts his core in half.

Unbridled Fury:
Turn 1- Charges his energy blast up and aims towards the source of his energy. 
Turn 2- Unleashes the energy and destroys Erde's core.

Maxwell:
Turn 1- Pulls out his shield and rushes towards Erde.
Turn 2- The shield collides with so much force that the earth is blown away from his core.
Turn 3- Maxwell grabs the stone and crushes it.

Edmund: 
Turn 1- Swings his arm across the ground, tearing the earth up and knocking erde into the air.
Turn 2- Fires a weak laser at the now airborn titan.

Beowulf: 
Turn 1- Charges its laser.
Turn 2- Charges its laser.
Turn 3- Fires its laser.

Kanitah:
Turn 1- Moves four rings to his right hand.
Turn 2- Moves four more rings to his right hand.
Turn 3- Moves four more rings to his right hand and punches Erde in the chest with enough force to blow apart the Pyramids of Giza.

Arkaeis:
Turn 1- Charges his void magic.
Turn 2- Fires his void magic at Erde's chest.