At the moment the only Kimimaro and Sasuke is the only ninja with a curse mark II transformation. So here are some of my ideas for the sound four

Sakon and Ukon

Mystery: Body Merge

(this a reference to when either sakon or ukon merge with kiba's body and kiba stabbed himself to foce sakon/ukon out of is body.)

Cause Immobile to a selected unit and the selected unit will take poison damage for 3 turns

Standard: 3 Legged Kick and 3 Handed Punch

Cause heavy taijutsu damage to a selected and a chance for repluse

Passive: If this unit were to take fatal damage this unit will revive and become 2 different units (sakon and ukon). Sakon will cause repluse(Orchimaru stated Sakon is more physically gifted.) and Ukon will cause high float(Orichmaru stated Ukon is likes to attack people from the blind side while Ukon keeps them busy head on)

Chase: Chase to Low Float to Repulse

Passive: Body Split: Dodge one standard, mystery, and damage once per turn

Passive: Curse Mark Significantly increase attack and defence every time this unit suffers damage

Tayuya

Mystery: Demonic Flute: Phantom Sound Chains

Summon "Doki" puppet. If Doki puppet is alive, cause heavy taijutsu damage to entire team and cause low float to selected unit

Standard: Demonic Flute Music: Increase attack and ninjutsu up to 4 ninjas on your team and lower resistance and defence of 4 enemy ninjas on the enemy team

Passive: At the beginning of the battle summon "Doki" puppets. If you have a puppet replace standard attack with "Doki will cause immobile and cause low float and has a chance to absorb 20 charka

Chase:High float to Low Float

Passive: Curse Mark Significantly increase ninjutsu and attack every time this unit suffers damage.

These are some of the ideas that I have so far...