I really wanted to make a good Lorfindel deck to go with my wife's Radagast Eagle swarm deck. She covers all the attacking needs with eagles and ranged etc. I take on the brunt of questing, control, and a little defense.
Mulligan for Mirror of Galadriel or Gather Information. Other cards needed early Light of Valinor, Nenya, Silver Harp, and Necklace of Girion.
Glorfindel gets, Asfaloth, Glamdring, Light of Valinor, Necklace of Girion for sure
Galadriel gets Nenya and Mirror of Galadriel, Magic Ring, and Unexpected Courage
Beregond gets Protector of Lórien and Self Preservation
Once you get Mirror out with Silver Harp you honestly have no trouble finding the cards you need.
I usually put Valiant Determination on Northern Tracker because then you get the progress but still can use their 2 attack and 2 defense stat.
One weakness can be paying for the cards but Magic Ring is doing it's best.
Having a partner deck that can kill enemies quickly is very nice, however, in theory, it could hold it's own once Glorfindel gets Glamdring and Elladan gets boosted by his brother. Haven't tried this deck solo, but I think it would be decent.