I can do the first 2 parts solo. All you need for the first part is a high speed build and a sniper rifle. For the second part all you need is a sniper rifle and maybe a long range scout rifle. Deathsinger... I have attempted her solo but I always seemed to be blasted by the Knights from above. Crota I have also tried solo... I need a G-Horn or a Hunger of Crota do bring down his shields faster. My One Way Ticket 000 just is not powerful enough, even with the cluster bombs.