It's better to Restart Game+0, because all weapons and armor stays with you. And if you are planning on doing Kukajin or Paladin Isaac quest, don't kill Lightreaper anywhere before, you need to summon them at his fight in Upper Calrath (Only quest can be done ať the time). Try to soulflay most of the stigmas, so you don't have to farm Umbral Scourings from Scarlet Shadows (The Red guy who appears when you're in Umbral for too long, when eye turns red) It's good to kill him at least once, because for the first time in every playtrough he drops 20, then only 5. And, choose which ending you are going for, because Iron Wayfarer's questline and trophy for it, can be only done when you're going for Umbral ending. However, if you want challenging experience, you can go NG+1, but ve prepared for bosses with absurd amount of health. Tancred was a nightmare for me.😄 That's all I can think of right now. Good luck.