The problems I usually find are the absolute inability to run, giving too much
tp, or self corruption if the opponent doesn't play minions. I think that having a way to remove burdens in the fellowship phase is essential, in case if the opponent stops playing minions, and by far the best choice for that is
Shadowfax, GOTM (US is nice, but
GOTM is absolutely your best choice of burden removal). The main reason I try to make
BoO work from time to time, is that it allows you to use
SftF in a much easier way (you don't need to spend half of your starting fellowship for
Leader of Men).
For example you can have a starting fellowship like
Gamling, Defender of the Hornburg and
Theoden, TaP, Gamling pulls a horn, you pass it to Theoden, pull 2 followers, pass the horn back, then burn Theoden with
SftF, and you found 7 FP cards of your deck already (and
SftF can pull 3 Symbelmine too for further deck thinning/ even better shadow draws).
Another interesting setup is using
Citadel to Gate +
GOTM to take care of the burdens, and recurring
CtG with a
Dasron engine (probably with
Last Stand). Of course this gives out a huge amount of twilight, but also has great healing potential (
Faramir, CoI would be a nice way to keep Gandalf healthy for the
CtG uses).
You can also go for the classic
Elrond, LoR +
Ottar, MoL combination, if you pair it with elves (you can use
SftF to get Elrond and
AWiNL to get
Ottar). I never actually made an elvish version, but elves have some great way to remove threats like
Into the West or
Glorfindel, EL to support
GOTM. The best shadow to pair
Ottar with is tentacles, so you don't have to worry about having cards to discard. Elrond also gives a great way to power
Last Stand for
Dasron with a couple of other site 3 gandy man allies.
The only reliable version I played on GCCG was standard format, and used only Gandalf culture with a lot of card recurring to allow doubles.
Grimbeorn + his axe,
Dasron +
Last Stand,
Erland, DC +
The Terror of His Coming (pulling back extra copies of
Last Stand/
Watch and Wait to discard for doubles),
Look to my Coming and so on. Of course I used
SftF in that one too. It used to give a lot of twilight, but managed to win a fair share of its games.
I tried to make it work a lot, but was never really able to break any
BoO deck, all in all I think it can't make a top tier deck, but it is very fun to play

.