I've received an answer from Caleb for my question regarding effects on Doom, doom, doom card. So I share, maybe someone find it interesting...
Here is my question:
What happens if I choose to remove the last damage token from Doom, doom, doom card due to "When revealed" effect of Moria Orc during staging step of quest phase (Moria Orc effect is: "Either remove 1 damage from Doom, doom or reveal an additional encounter card")? Is Balrog still added to staging area at the end of that quest phase (or at all then)? Text on Doom, doom says: "At the end of the quest phase, remove 1 dmg token.
THEN
, if there are no damage tokens here, add the Balrog to the staging area."
In FAQ there is written: "(1.15) The word "then": If a card effect uses the word "then", then the preceding effect must resolve successfully for the subsequent dependent effect to resolve." But the preceding effect didn’t resolve succesfully - the last token was already removed earlier, by Moria Orc effect, so I can't remove it at the end of the quest phase.
(BTW: There is also a treachery card "Fool of a Took!" with similar effect to Moria Orc).
I thought I'd found a backdoor for not putting Balrog into play, but here is what Caleb answered:
Ignore the word “then” on Doom, Doom, Doom. The Balrog is added to the staging area at the end of the quest phase if there are no tokens left on the objective.
I will probably have to add an FAQ entry to clarify that there is no way to keep the Balrog from entering play when there are no tokens left on Doom, Doom, Doom.
So, there is no way to avoid Balrog other than quest like mad in this scenario.