I think T3 is the easiest by a long way. Drop the target straight off the ball launch, ball returns to right hand flipper, and shoot it straight up again. Do this three times and you have multiball before you even use the left hand flipper.
Good call but ill say Transformers, exactly the same minus 2 shots!
Soft plunge ball to right flipper, hit Megatron lock. Repeat 4 times. Don't get any simpler than that!
Pro version that is, add one more shot on the LE.