Approximate upgrade path:

1) Charisma

2) Emergency Cache x1 --> Sacrifice x1

3) Shrivelling x2 --> Shrivelling (3) x2

4) Emergency Cache x1 --> Emergency Cache (2) x1

5) Mists of R'lyeh --> Mists of R'lyeh (4)

6) Arcane Initiate x2 --> Arcane Initiate (3) x2

3+2+6+4+6+6=22xp