Don't know if this will prove useful, and I don't have warlords so I can't open the save, but here goes...
How many civs? As you're playing on a duel map I'm guessing it's only one, in which case you need not worry about the naval techs too much unless you've started on a really tiny island (bearing in mind that even the bigger 'continents' are pretty damned small on this map setting). You will need them for military reasons later on, but in the early game you'll want to be building a really strong economy, so as to get a good tech lead on your rival.
I would suggest you prioritise the techs that give you economic benefits, wonders and those one-off bonuses for getting there first (free tech, free GP), picking up the naval techs along the way as necessary. Then, when the time comes that you can build caravels, go take a look at the world beyond the seas. Up until that point you can safely avoid building many units (assuming you've dealt with any barbs), but if your opponent finds you first you'll need to start the military buildup then.
If you've got a decent lead in military techs (which, unless your opponent has a much better continent than you, should be the case - the AI is pretty good at teching, but a human player should easily beat them, all other things being equal, by prioritising techs and builds/improvements that speed up the tech rate), then build up your army/navy and let the war of conquest commence.
If not, then concentrate on your navy and get ready to do some serious anti-commerce/production/resource/health/food guerilla attacks, whilst using your navy to guard against the likely counter-attacks. You might also be able to colonise a couple of smaller islands elsewhere on the map, if the AI hasn't got there first.
Good luck!
ps. any chance of a couple of screenshots for those of us who haven't got warlords yet?
[edit]: Sorry, it took me so long to write this that I didn't see pigswills response, so I guess there's more than one other civ.