I am wanting to take the leader ship feat and due to story line I was thinking of asking the GM if I could make the cohort a spirit / ghost .
My thoughts were this, the ghost template really does not fit with the theme I am trying to get ( a undead that died tragic ) so I was thinking of asking the GM if I could just apply the incorporeal subtype to the cohort and add CR+1 on to it ( to justify the incorporeal sub type ) and call it a spirit to make things a little simpler but get more of the theme I am going for .
should adding incorporeal sub type to a class based cohort cost the same as adding the ghost template ( CR+2 ) to it or would adding ( CR+1 ) be balanced .
Thoughts ?