Hi there and welcome to the boards!
First of all its nice if you define what kind of format you want to play with your friends and such, or against people worldwide at GCCG. The most traditional are Movie block (sets from 1-10, with sitepath from RoTK and check pre-shadow x-list) and Standard (Sets from 7 to 19, sitepath from set 11 and beyond, x-list), but there are many people that play FoTR (sets 1-3) and TTT block (sets 4-6).
But feel free to adjust stuff (like sitepath or x-list) the way it suits better for your playing community.
In concearn to your deck i have to agree with putridbreath, i don't see how you can go any further than site 4 or 5 with only this 3 companions, since your deck isn't a super choke. Take a look at the boards here and you will find some nice deck ideas and strategies.
If you want to keep the deck Hobbit / Nazgul there are a lot of options.
Instead of posting a full deck list here i will just try to give some tips so you can came up with something original (and respecting the cards you own).
If you like the concept of wounding hobbits getting benefits from
Greenleaf and
Mind Your Own Affairs you should consider a few things:
-
Shadowplay may be an excellent addition, but for that you need to have great healing ability, which can be achive through allies or bouncing companions (the one you can discard and play again later or that you put it back to hand).
Unheeded may also works nicely.
- Your companions must be strong enough to survive if some dangerous minion gets throught skirmish (and belive me, sometime they will). So focus on get them at least some strenght and some backup like
Bounder (i would use more than 1 copy),
There and Back Again and
The Tale of The Great Ring.
- Another guy that works very nicely with
Mind Your Own Affairs is
Smeagol, Always Helps (
7R71) which turns
Nine-fingered Frodo and the Ring of Doom (
10C112) a nice cards to peel the threats or the burdens you may be adding.
Don't Look at Them (
6R39) can also be interesting.
- If you go heavy on tales you may consider cards like
Bilbo, Well-spoken Gentlehobbit (
2U96), since shire guys doesn't have many condition discard.
For Nazgul you can add cards like
Bill Ferny, Swarthy Sneering Fellow (
2R75), some possessions or pumps. Conditions like
Black Breath can works nicely also. Consider you worst problem here would be direct wounding (that would kill your guys before they ever land on skirmish) and tank companions, like
Durin III, Gil-Galad +
Aiglos, fully loaded Gron, etc. So think some ways of ensure your guys will get to skirmish and win!
There are a lot of other options bt i leave to you the rest!
I hope i helped somehow.