I presume that you are playing a casual format if you are playing with friends and looking across all sets. I would start by confirming with your friends if there are certain cards or sets included or excluded.
The best cards in Movie Block for the
![Gandalf [Gandalf]](https://lotrtcgdb.com/forums/Smileys/classic/gandalf.png)
culture are largely found in the Fellowship of the Ring set.
A Wizard Is Never Late,
Servant of the Secret Fire, and
Glamdring are all "power" cards, although the events work better with more than one copy.
The Battle of Helms Deep is difficult to find sealed, but introduces the hearty Ents who are also
![Gandalf [Gandalf]](https://lotrtcgdb.com/forums/Smileys/classic/gandalf.png)
culture. The Ents of Fangorn, the following expansion, may be a better fit and also has the double-edged sword of
Gandalf, Mithrandir (who is incredibly fun in casual) and
Glamdring, Lightning Brand.
Of course, you can take a look at all of the sets, as the Wiki has every printed card available and posted directly above. You will also find a great collection of deck designs in these forums.
Welcome back, and cheers,
-wtk