I thought I worded it perfectly before! But I'll elaborate!
Trying to bulb Feud takes you down a sub-optimal tech path. Building the Oracle forces you down a specific tech path to even build it plus you have to invest hammers to do so. Continuing towards Feud takes more time and once you have it leaves you with a dead tech imo. Dead because the AI always go up that path so your trade will suffer - not to mention you have missed other valuable techs such as Alphabet - Currency - COL all enhancing your research via economy or trade.
The time in research and hammers is time and production lost which could have been used earlier for an Axe or Chariot rush. The OP could already have 3-5 (minimum!) conquered cities by the time he even finishes getting Feud.
If the OP does go the Feud route trading for it will not work. First, AI's won't have Feud yet and it won't be available for trade. If it was available for trade other AI's could also have LB so a LB rush wouldn't even work.
If the OP goes the Oracle route I seriously doubt he has time to tech the preq for the Oracle and also finish researching Monarchy and Writing. On Immortal the Oracle should be finished no later than 1500 BC. At Emperor you need to have the Oracle finished no later than 1280 BC. I don't think that's enough time to research everything necessary to choose Fued as your free tech.
That means the OP needs to research it himself which leads to a slower war and a slower land grab (already slowed by more production and research directed towards the Oracle). Reiterating - an earlier war with Axes or Chariots would work better IMO.
Edit:
I did! You just don't have enough knowledge about the game or mechanics of how they work to understand!

Sorry! Lol. I see the words GP - bulb - and Feud in the same sentence and I freak out! Stop! No! Tackle HIM! Don't let him do it OMG! Seriously - ! and ? were perfect!
GP = Great Person
Bulbing = using great person to discover a tech (with the lightbulb icon).
I have Pee Pee in my pants after this one! Too cute. Har Har Har
