As to how Partha might be prevented from slaying Jayadratha in battle. His several Akshauhinis will also protect the latter;
यथा जयद्रथं पार्थो न हन्यादिति संयुगे। अक्षौहिण्योहिताः सर्वारक्षिष्यन्ति जयद्रथम्॥