With couples I use a dual approach. We work on strengthening the foundations of your relationship using the seven principles developed by John Gottman. At the same time we begin working on conflict resolution using Imago techniques. You will find that over time, as your relationship foundation improves, your conflicts will become easier to resolve.
I prefer the Gottman method for couples counseling because it evidence based. I use it in conjunction with a problem solving tehcnique from iamgo counseling.
DBT focuses on 1. Mindfulness, 2. interpersonal effectiveness, 3.distress tolerance and 4.emotion regulation. Once you have these tools, you will be far better off and able to handle much more easily what comes your way. Besides DBT I use Positive psychology to build on your strengths. We will learn about PERMA. (Google PERMA positive psychology). :)