Sadras - Celebrimbor mission

In this Celebrimbor mission I explain that there are two key skills to unlock before attempting this mission to make it dead easy, they are:
chain of souls which allows you to chain domination of orcs
deep freeze- doubles the duration of freeze pin from an elf shot
Both the above skills with help with quickly consuming 3 orcs to complete one bonus objective, then by doubling the duration of freeze pin it gives your allied orcs more time to kill at least 3 orcs whilst they are pinned to complete the other bonus objective.
The more combat brands you do using chain of souls, means you will complete the main mission objective quicker of having allied orcs kill other orcs