I guess I might be on duty of the war or the war preparation.
Here's my list of units needed in the beginning of the war:
4~5 Battleships
15+ Fighters on Carriers
16 Bombers
20 Marines on 5 transporters
20 Tanks preloaded near Brennus or Liz's border
Unfortunately we can not adopt slavery (the major reason I research MM 1st. Also I always defy this resolution). Still I think this can be done in 20~30 turns with rush buy.
I don't know whether taking vassals will affect the altitude of Izzy & Saladin to us. I think even completely wipe them out does not take more than a couple turns.
I think reloading to get rid of the trade bug is OK.
ATM our production is as follows: 258h, 1290c at 0%. We have no HE. So with rushbuy our max unit production is around 650h/turn.
We'll grow a bit but I think we leave Lisbon on internet.
We need to research rifling ASAP and for this plan we should also get flight. I would still think we want to go for internet so maybe wait on flight and build all the other units. If we sell DR to Sal for 280g we can research rifling in one turn.
This army will cost us: 20xtanks=3600
20xmarine=3200
5 transports+5 BB=1750
5 carrier=850
15 ftr=1500
16bmr=2240
=13,140. So that's right around 20 turns--likely a bit more since we need some barracks, rounding, etc. If we go internet for flight then we can rushbuy the planes and aircraft carriers in a few turns and likely have the force ready to sail in around 24-25 turns. We can also take PS for some unit hammers.