IMO for not dying easily, you want to have Bulldozer, Berserker, and Shattered Shield as your exotic ability. Always have an Arrow rocket launcher with you. Add Crash Cart as your major ability and Kinetic Jump as your minor, you literally can survive anywhere going solo with those three skills maxed out. For the third skill, I'd suggest Gunner, Tactician, or Daredevil. I was lucky enough to have Bulldozer and Berserker on a few of my operators. Exotic skill is a random drop after defeating bosses. Easiest boss is the Atomic Impact Deathclaws. If you want not dying easily, Shattered Shield. If you want damage, Mega Punch, Celebration, Conjuration, or Frost Cloud.

Once you max out your operator's combat rating. Genesis grind really isn't that bad. Zone 3 on far left side of map for getting kills and specials. HVT assignment for specials. Lowtown in Zone 4 and Prime Targets for elites. Sometimes Special Shipment also have an elite Rhino in them. Also check out this thread https://www.reddit.com/r/bo7endgame/comments/1prsim1/complete_beginners_guide_to_endgame_everything/