After passing Poison Ivy, you will see a large right facing dihedral. On the left wall is a short thin hand crack. This makes up the middle of Lost Soul. Above it is a thin seem that is only used for protection. Use a #1 camalot at the top of the thin had crack to protect the crux, which is pulling up onto a good 4" ledge. You may be able to get some small stoppers in here before pulling onto the ledge. There are plenty of face holds above the crux and you will need a #0.4 camalot and a #2 and or #3 for the top.
After reaching Secret lake, follow the base of the cliff. The trail follows a ledge that is about 20' above the lake. Lost Soul starts at the far end of the ledge at which point it is only about 8' above the lake.
Standard Rack up to #3 camalot. Some tiny gear to protect the crux if you are squeemish.