Blackpowder Promise

During your trip to Sundermount you may encounter the Dwarf Javaris and his less than alive guards. Help save him from spiders on the mountainside and he'll ask you to take down the Tal-Vashoth Qunari. Head to a lower part of the mountain and you'll find a Qunari that has abandoned the Tal-Vashoth. You can't convince him to help, but he will warn you about his former clan's actions.

Head up the cliff and kill the Qunari. Use cross-class combos if you've unlocked them along with strong elemental spells. The line of Elemental Cold spells along with a Two-Handed Warrior are a good means of taking on any Qunari enemy. After taking down the outside guards head into the cave.

You'll mostly be fighting the same enemies with the same tactics: freeze with ice magic and follow up by exploiting Brittle damage boosters. Some of the main threats are the Qunari mages that have powerful magic of their own. Stall them with spells such as Petrify or Sleep, or just be quick on killing them first. There will be at least two mages: one at the top rafter, and a second that will appear near the ground. Be sure to move your ranged characters away from these deadly mages or they will be caught in some fierce spells.

After clearing out the Tal-Vashoth, head to the Kirkwall Docks and into the Qunari compound. If Isabela is in your party she will refuse to enter, leaving you with only three party members. Inside you'll witness a chat between Javaris and the Arishok. Convince the Arishok to force Javaris to pay you to gain not only a reward, but some respect from the Qunari leader.