I worked this a lot trying to figure out the best approach. I only ever found d one player who could solo without dying and they were using a max hit fatigue weapon with an unusual mix of mods iirc. Ultimately I just resorted to taking a backup toon who held supplies and cast tree / wod at the end. It is possible to solo but definitely more difficult than medusa, paroxy, or melisandre. Having a second toon will speed recovery and finishing up a lot.