Attack on Stormreach Question

[PentegarnDarras]

Once you've finished the chain, can you continue to just run the last quest like several other chains or do you have to run all 4 over again to get the final reward?

[Esserbe]

You don't need to reflag to run Siegebreaker, but you need to run all 4 quests in any order to get a chain end reward from the half-orc.