Yes, you will be soft capped with one application of Parry with the slotted you said as long as your SO are good.
"All right, they're on our left, they're on our right, they're in front of us, they're behind us...they can't get away this time"- Chesty Puller US Marine Corps
Just running some quick numbers from Mids. If one Parry application is applied and I have SOs 3 slotted on all toggles in SR, Agility and Dodge 2 slotted with SOs, it looks like Melee Defense is soft capped (with Combat Jumping).
Am I doing the math wrong or is that a correct statement?