Sorry for taking so long to get to this, work has been mad!
Regarding thoughts to abandon CS race, I think this statement sums it up for me
After some testing I think slaving te library is not as efficient so here is the plan I like:
second city goes to 1w of copper to share both corns
Capital starts worker and uses both corns until size 6.
Both workers road on copper, chop plains tile for worker and then start cottaging 1N of capital, then cottage 1S then 1SW and then 1W, then improve copper and then chop libraries first second city and then in capital.
Second city makes settler after library and runs 2 scientists, capital stays all cottages.
RESULT : We have another settler turn 93 and Oracle CS turn 94 and capital size 6 with 4 hamlets.
Key is to get math first and then chop last3 forests in capital for Oracle.
If you are OK with this I can make PPP for first 15-20 turns of plan.
That's a very good result indeed. I think the 1NW site has more long-term potential, but understand that we should get to UN before we need that city to carry a lot of weight. What I really like about your plan (much like my option 2) is that cottages have already been develped in time to make most use of them with CS.
Write up the PPP as you see fit. You are welcome to practise it a few times... my own experience shows that if you miss just one worker move or build turn or slave at wrong time it is easy to lose a turn (or more). So if you're confident you can reproduce it easily on the test game, then we'll be ready to let you do it for real.
Now... we need some "What could go wrong?" plans to consider as well. Like Narri points out, if the Oracle has been mapbuilded to go unusually early, then the teams that handle the set-back and make best adjustments will excel. So a stop of course if Oracle is built iafal, for re-planning. What else can go wrong? We could find other AI much closer than we expected, or find we are isolated with Zara... but those shouldn't be anything that interupts our sling plans. Anything else we can think of? Oh yes... barbs. Barbs could definitely screw up the plans and require an extra defense unit or more. That could force a set-back of the date. So it might be good to pause also if barbs show up that could cause trouble. Lions don't count.

But we won't know until we start playing again, so a PPP is in order.