Best Suggestion Is Using Ermac's Un-Blockable After The EX Force Push(Telepush). After The Enhanced Force Push, Dash Up To Him Really Fast And Do, B+2 Full Charge And Then Force Lift Into A Combo. As Most Of Us Know, Shang Tsung Has No Good Wake-Up Attacks, So This Technique Should Always Work, Even On Expert Because He Mostly Blocks After Getting Up.
On Beginner, Shang Tsung Is Very Aggressive And He Never Really Blocks, So Attacking Him While He Is Getting Up Almost Always Guarantees A Hit.
Stay Close To Shang Tsung As Getting Away From Him Will Lead Him To Throw Fireballs At You.
I Wouldn't Suggest Using Mileena For This Achievement... It's Possible But There Are Some Other Characters That Have Less Chances Of Getting Hit. Just Do It On Beginner, And Use Roll While He Is Getting Up.
You Do Not Need To Beat Jade To Get The Achievement, You Just Need Her To Appear, But I've Beaten Her With Johnny Cage, Mileena, And Sektor.
She's Projectile Proof, So Using Someone Like Shang Tsung Is Not Going To Give The Best Results LoL.
If You Really Want To Get This Achievement If ALL Else Fails, The Best Suggestion Is, Projectile Parry With Smoke The Whole Two Rounds.
EX Shake In The Beginning So That Your First Hit Is Guaranteed, Then Just Turtle As Far As Possible Away From Him, And Set The Timer To 30 Seconds If That Helps.