Varric typically approves of the Inquisition's steps, a great number of choices you make will not likely have a major impact on his approval As long as you

Appropriate from the beginning he will criticize his brother, mentioning that describing Bartrand as "difficult to choose" by Worthy immediately after Hawke

Ideal from the start he will criticize his brother, mentioning that describing Bartrand as "hard to consider" by Worthy soon after Hawke's diplomatic altern

It really is later revealed that Marethari sent Merrill absent because the latter were insistent on seeking to restore the elven artifact which sickened two

This will also result in a rivalry increase with Aveline and Sebastian, and a little enhance for Merrill and Varric. If you do not want to shed Fenris then