Not all that much more difficult objectively for someone who mastered Mod2 skills, but it will be expected that you have the highest level of preparedness. Problem solving abilities in excess of simple skill circuits. Very good team dynamic and communication. The dives should not feel difficult, despite combined tasks. Well rehearsed dives and problem solving with no weaknesses in planning, execution, awareness or communication.
Your instructor shouldn't take you deep until you show readiness, and by then deep dives will seem easy. It is very easy to just descend to 100m, do a skill and ascend to deco. But problems occuring at depth have less margin for correct and calm management.
Instructor should come away feeling that you have more calm and controlled expertise than is required.