These are the arcs that I recommended, if you want to do a clone wars movie trilogy.

clone wars movie

Domino Squad
3.01 – Clone Cadets
1.05 – Rookies
3.02 – ARC Troopers

mandalore arc
2.12 mandalore plot
2.13 voyage of temptation

Second Battle of Geonosis
2.05 – Landing at Point Rain
2.06 – Weapons Factory
2.07 – Legacy of Terror
2.08 – Brain Invaders

Holocron Heist
2.01 – Holocron Heist
2.02 – Cargo of Doom
2.03 – Children of the Force

Young Boba Fett
2.20 “Death Trap”
2.21 “R2 Come Home"
2.22 “Lethal Trackdown"

Obi-Wan Undercover
4.15 – Deception
4.16 – Friends and Enemies
4.17 – The Box
4.18 – Crisis on Naboo

The Nightsisters Trilogy
3.12 – Nightsisters
3.13 – Monster
3.14 – Witches of the Mist

Darth Maul Returns Arc
4.21 – Monster
4.22 – Revenge
5.1 – Revival
5.14 – Eminence
5.15 – Shades of Reason
5.16 – The Lawless

Umbara Arc
4.07 – Darkness On Umbara
4.08 – The General
4.09 – Plan of Dissent
4.10 – Carnage of Krell

Ashokas final Arc
5.17 Sabotage
5.18 The Jedi Who Knows Too Much
5.19 To Catch a Jedi
5.20 The Wrong Jedi