How about this?
2M, 1R, 1W Combo:
Player Character: Qunari Knight Enchanter, who has spirit and Knight Enchanter trees maxed out.
Warrior Slot: Cassandra for her tanking and Templar abilities, because those mages can ruin your day.
Rogue Slot: Varric because he's awesome!
Mage Slot: Solas for dps and a second mage to cast those useful barriers.
1M, 1R, 2W Combo:
Player Character: Qunari Knight Enchanter, who has spirit and Knight Enchanter trees maxed out.
Warrior Slot: Cassandra for her tanking and Templar abilities, because those mages can ruin your day.
Warrior Slot: Iron Bull for a DPS warrior build
Rogue Slot: Varric because he's awesome! Though perhaps I'll consider Sera because of her Tempest abilities.
1M, 2R, 1W Combo:
Player Character: Qunari Knight Enchanter, who has spirit and Knight Enchanter trees maxed out.
Warrior Slot: Cassandra for her tanking and Templar abilities, because those mages can ruin your day.
Rogue Slot: Varric because he's awesome!
Rogue Slot: Sera for a second rogue archer!