The short duration in this build is necessary for your 2. It will allow you to instantly gain back your shields and remove all status procs damaging your health. 3 and 4 are not used in this build.
This build will buff your [Balefire Charger] to over 115k damage, and if you charge it over 230k damage.
Use your 1 to equip your [Balefire Charger], use your 2 to remove status procs and gain back your shield. You will be able to one shot almost anything that comes your way as well as solo the index with ease.