Help Building Ghost Buster Dr. Peter Venkman

[Press3]

Greetings,

I've been wanting to build Dr. Peter Venkman from Ghost Busters (Bless you Bill Murray)

Stats are

STR 15 DEX 14 CON 12 Int 17 WIS 1 CHA 9
Traits Indomitable Faith, Reactionary
Human Lawful Good, Dark Archive, +2 bonus to Intelligence

The essential build I'm curious about is
6 lvls in Spiritualist, archetype: Ectoplasmatist
1 lvls in Occultist, Transmutation and Illusion Implements with Philosopher Touch
1 lvls in Investigator

Essentially what I'm curious about is Standard action manifest +2 Ectoplasmic Lash, free action identify target with +14 knowledge check and Inspiration if needed.

Next turn Standard action Legacy Weapon Ectoplasmic Lash, making it +3, give it +1 Bane, (3-1) making it a +2 Bane (target type) Ectoplasmic Lash. My question is can you Legacy Weapon Ectoplasmic Lash making it a +11 4d6 + 5?

If so can I then next turn, Standard action Legacy Weapon Ectoplasmic Lash, making it a +3, give it +2 Holy, (3-2) making it a +1 Bane Holy Ectoplasmic Lash?

Also if you have any recommends for feats I should take, that'd help.

[Daw]

No, that may be Ray or Egon.

Peter is a rogue, charlatan archetype.

[Imbicatus]

All of the ghostbusters are ectochymist alchemists. They are the only class that has ghost traps and they can make their weapons ghost touch.

[Magog]

You should also look at the Haunt Collector Occultist archetype.