I'd say it depends on your metagame but in general i find that my energy line for vilegar ends up looking something like this
5-7 psychic
2-3 warp energy
2-4 call energy
1-3 rescue energy
I'd also say it depends on if you play 4 tomb v. 3 tomb or 3 Gastly v. 4 Gastly. Also if your metagame is more tilted to SPs you'll want that instant recovery if it is more towards slower decks you might be able to recover fast enough w/out as many rescues.