Yeah, the hidden assumption here seems to be that Drycha is paying this like a tabletop battle. In which the goal is basically to kill everything that opposes you, and things are always roughly balanced so it is possible.
I think that she's actually seeing this as an ambush, will flee when our reinforcements arrive, and has one particular target. Unexpected resistance is to be ignored if possible, and that includes any fools hunting her directly, so the objective can be accomplished and she can flee before the the mortal threat that she knows exists everywhere outside her woods can be brought to bear against her.
So my bet is that based on votes, we hunt her, she hunts Boris, and we lose that game because she's more powerful and therefore will be able to act first. We are going to end up in a running teleport chase away from the armies as she tries to get Boris to a world root before we can kill her or him.
Which, well massively cinematic, does put us in a one-on-one duel with her where we have to go to her and she knows it.