Our groups aim to have Adlo (SCH), Sacred Soil (SCH) and Stoneskin (OT or MT) up for every Death Sentence. WHM should cast regen just before DS (so that it'll have full effect despite of debuff) and time Cure 2 on tank so that it heals for full effect. In addition to these use Virus for DS whenever possible and rotate Eye for an Eye on tank (from both healers and BLM/SMN).