Use warlock turret build. You can have hellion solar turret with a stasis turret getaway artist with grenade arc turret. Will do so much for you. Then use red death to heal yourself on kills. Also run high resilience and recovery and discipline. Also use artifact mod that gives damage resistance when amplified. You do that and you will be able to think more while the turrets do work for you. Use healing rift get solar turret, consume grenade get arc and stasis turret. Along with exotic pulse that heals you on kill. I mean it doesn't get any easier that that friend. For damage use linear fusions in campaign. Or use a good hammerhead. Something that can crit the tormentors and subjacators. Rockets and grenades aren't so good against them. I used storm chaser linear fusion the whole campaign worked great. Also the new solar super for warlock is very good and so is nova bomb right now.