So I just got STOMPED in Expedition...

1st trial: 0-2, 2nd trial 1-2.  I did go 7 wins on my 2nd trial last week so I know I'm not a total n00b...  That might have been what did it, actually--in that trial my deck was a Frejlord value deck and a lot of my success came from Yetis and +1/+1s and Anivia; I think I tried to force a repeat of that strategy.  And this week, some of the decks I fought were just brutal including a Shadow Isles that went off on The Undying and a Noxus deck that played 4 Legion Saboteur over the first 5 turns.

On the bright side, I am glad to see the format at least supports multiple different strategies.  I guess I'm just venting.  :-P

Mono decks are just powerful in expeditions. Try to make mono decks in expeditions. Mono Demacia, Mono Shadow isles and Mono Noxus are good choices for at least 4-5 wins. Other mono decks are fine too but most poweful ones are these 3.

Demacia is one of the good choices for every run. Mostly for challenger units. Don't be trapped with the idea "if i can get elusives, i can win more." Elusives are good when you can buff them.

I got my 5+ wins with Demacia mostly so suggesting you to do the same.

Also, if you can get Heimerdinger in first choice, just grab him. Heimerdinger is one of the greatest champions in Expeditions. Grab some Demacia stuff with Heimerdinger and you will be around 4-5 probably if you are a good pilot.