A larger empire won't help? The faster we grow, the more units we have, so we can attack earlier and thus we have less units to face, so we can attack our next victim even earlier and so on. Not to mention that we'll be able to grab more resources and luxes.
I understand the importance of trading and surely we do need 1 curragh built before the granary to get pottery (but not more then that), but why on earth do you want a settler before a granary? It depends on the start of course, but in most cases a granary before a settler is much better.
Even if we don't get writing as monopoly we can get literature - from my experience AI tend to ignore optional techs even more on sid. If we grow fast in the first 50 turns we would be able to max-research it in about 20 turns. With a monopoly on writing or lit we should be able to trade for tech parity. So we need contacts with
1. At least one civ to trade for pottery by the time our prebuild for granary is complete (~20 turns)
2. Many contacts by the time we research writing or lit (50-70 turns)
I think 1 curragh before granary is enough for that.
Some notes about micromanagement: since at first the only things we are going to build is settlers and workers there is no need to do lots of mining - i think we should only build enough mines to produce settlers and workers at maximum for given fpt rate. I know some people like combo factories, but i am not a big fan of those because they take a longer time to setup delaying production and also need lots of worker-turns for all the mining. We don't only need warriors for MP when we switch from min-research to max-research which is 50 turns away.
I got to civ only now, i'll try another start and post it here. I still don't really like Nero's start even though there was good trading because there is no river and because of non-optimal worker management in the beginning which propably delayed growth by a few turns.