My experiance is after a weekend of doing the first campaign with all expansions to date was 5-4 (a ruor encounter was added hence 9 total dungeons) wins to the Heros. We were all fairly inexperianced at this game but seasoned gamers. Two of the heros 1st timers. The OL won the first two dungeons and the interlude. Two of the games being down to the wire, very exciting.
Post match analysis of the 1st Act was OL was on par if not stronger than Heros (plus their inexperiance and getting used to the Class card combos)
Second act was narrow win for first dungeon with OL winning second then Heros third. They were by this time a lot stronger with class card etc ugrades whereas OL Act 2 cards did not seem to reflect this. We found that even though the OL won dungeons he rairly benifited from them, IE getting Lieutenants or HP for later encounters, so that the Finale was a bit of a damp squb, with a very week Dragonlord Gryvorn and a cowering Baron Zach trying to find somewhere to hide while the seriously buff heros stood knocking at the door.
This encounter was over in four rounds with the Heros standing behind the rocks healing ready to attack. So it took just 2 rounds for 1 of the heros (others stayed hidden) to step out and take all 20hp off in 2 shots. OUCH. Mind you Gryvon had two attacks needing serges, min of 1 for second attack, second surge gave fire breath, did not role any so the did second attack as had card to give 1 serge. Second attack did small dam and no fire breath so no one else affected.
Analysis of second act was with all the cards monsters and Lieutants to think about the OL could do with a second player to discuss tactics with and interupt Heros goes to play, or even just remember to play cards. As the heros spent lot of time doing this. The Build up of the toons and interaction of their class cards if played correctly started to show amuch more powerful group that could not be stopped by the OL, only harried. and in some cases very badly. The choice of Monster groups for each senario is very important. Ie lots of Kobolds to slow heros down in Ritual of Shadow. Slow mvoing monsters even though powerful are no good if they cant keep up with the Heros, so ranged monsters are generally better.
Two of the games came down to a crucial die throw missed, so all in all it looks to me like there are so many variable that a wrong choice of monster gp or use of card or die role at a certain time, could have a drastic affect on the balance and out come of a dungeon.
We nearly abandoned one dungeon as there was nothing the OL could do to win it. So the Heros insisted they would have been able to get all the search tokens. I said no so we played on. Splig managed to make a dash for the door when they thought they had him trapped, so they had to kill him finishing the game. As a result they did not get the loot, Very satisfactory. Yer i know a small victory but hay, any victory is a victory (in my book anyway).
All that said monday morning saw e-mails flying around saying how much people had enjoyed it and when were we getting together for the next one.
For those of you wanting balance, get over it life and conflict is nerver like that, but with a bit of planning your can usually lessen the lose.
Good gaming all