Dragon Age VI: Siege Harder

[Giggling Ghast]

You're tackling the areas in an unusual order. Typically it goes:

Hinterlands
Fallow Mire
Crestwood
Western Approach/Exalted Plains
Emerald Graves
Emprise Du Lion
Hissing Wastes

With return trips as needed to handle higher-level adversaries. (The Storm Coast and Forbidden Oasis has content for all levels.)

Regarding Here Lies the Abyss:

Spoiler

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Solas opposes keeping around the Wardens because he thinks their quest to destroy the Old Gods will end in greater destruction. Without getting into spoilers, we're not certain why.

Cole opposes the decision because the Wardens hurt people. Simple as that.