how has he passed the bow limit?
Anyway go for the spears and shields etc. But i wouldn't say you need the gondor in flames source book just yet, just build you're army then when you feel like expanding into more elite units that aren't in the rulebook get gondor in flames. Yes faramir is a good choice, but so is boromir however there are also many other decent named heroes for gondor but prince imrahil is probably the best "big" hero for a beginner, he has 1 very simple special rule, he is very powerful and he is very straightforward to use. Also if you have you're mind set on using a generic hero like a captain, why not use the model as a king of men with heavy armour and shield so he is a bit more durable? A final comment is swan knights of dol amaroth, these guys are better than knights of minas tirith, and they come in a plastic box set, which, unlike the knights of minas tirith box, contains all the pieces necessary to make a captain and a banner bearer, this means on top of the awesome cavalry bonuses, they get a captain leading them (6 dice to wound on the charge), can re reroll failed fighting dice because of the banner and if you choose to include imrahil they don't need a banner if he's within 12", because he counts as one!!
Another tip may be to get hold of one of the three wizards once you've built you're army, gandalf the white is the most powerful (and most expensive points wise) however radagast is probably the most useful for new players, he can ruin enemy cavalry charges and can heal you're heroes, not only that but with him you can volley anywhere on the map due to his "Master of birds" special rule. Combining radagast with a hero like faramir means that faramir will stay in the game for a very long time and he can take many wounds without using up any fate.
Also, once you have built you're force don't feel like its a crime to ally in other models, the whole point of the game is that each force has its own strengths and weaknesses and allying is the cure to this. Not only does it allow you to have a more versatile force, it really doesn't cost much money to do so, legolas, arguably the best model in the game for his point value, is probably on ebay for £2 right now, meaning you can have a one man scout force creeping round the side of the board picking off your opponents stragglers and protecting you're models (he can shoot 1 arrow into combat)
I hope this is all useful and good luck building you're army, make sure to look for the items you want to buy on ebay, its so much cheaper and there are tons of minas tirith warriors on ebay
Newer models such as duinhir or cirion and madril will not be found on ebay but most of what you listed is available for a bargain on ebay