i'd ditch
war and valor for
swordsman of the northern kingdom. basically a free +4 boost every time. with 4x
sword of gondor, you probably don't need the damage bonus that much.
ranger's bow can be ridiculously useful. especially combined with mablung. my rb-ranger deck starts faramir and mablung with
gondorian ranger and
ranger of ithilien each coming in at 3x apiece. +
frodo, tt = 9
the best thing about ring-bound rangers is how easy it is to replace them. my fellowship usually contains 5 comps at a time, and i just make sure faramir and mablung stay in the mix. if i'm pretty sure i'm not going to get enquea-d, i'll drop a bunch of comps at once and go for it.
i've seen
new errand run very effectively, but i've always been a little too nervous to try it. sometimes 1 wound just doesn't do much.
aragorn isn't ring-bound so he doesn't help a whole lot, and his defender text is good, but honestly, rb-rangers are one of the freeps that doesn't really need swarm protection if played right.
bottom line here: if i were you, i'd cut
3x
War and Valor1x
Ranger's Sword, Blade of Aragorn2x
Ring of Barahir1x
Aragorn's Bow2x
Aragorn, Ranger of the Norththats 9 cards. i'd try to squeeze in;
4x
swordsman of the northern kingdoma few more comps and a few bows
garrison of osgiliath probably wouldn't make it into my deck, 2 twilight for 3 strength isn't so hot since you don't care about fortifications. its unique, and i'd cut it also. fitting in a
bounder might be nice.
i think you will find that playing it my way has a lot more synergy than trying to keep aragorn in there. plus a
gondorian ranger can really help with that roaming problem you were having.