[X] Write-in - Bring the Swordmasters, and you may be able to deal with the threat here and now.
-[X] Scout ahead of the Swordmasters invisibly and soundlessly to ensure that the path is unwatched (or to deal with any such watchers), as well as to get a sense of the cause of the magic and its defences before the Swordmasters arrive so that, if necessary, you can order a withdrawal with the aid of The Wilds Undisturbed before they catch the attention of anything that might be present there.
--[X] Use The Wilds Undisturbed on the Swordmasters on the way, too, if it's possible to avoid creating Dhar by casting it on them but not yourself.
-[X] Leave the Sea Guard behind (and Eöl with them). They won't be as suited to the thick woods as the Swordmasters, nor as familiar with Chaos' hidden enclaves and what it takes to root them out, and a group of ten will hopefully be quicker and quieter than a group of thirty.
-[X] Scout ahead of the Swordmasters invisibly and soundlessly to ensure that the path is unwatched (or to deal with any such watchers), as well as to get a sense of the cause of the magic and its defences before the Swordmasters arrive so that, if necessary, you can order a withdrawal with the aid of The Wilds Undisturbed before they catch the attention of anything that might be present there.
--[X] Use The Wilds Undisturbed on the Swordmasters on the way, too, if it's possible to avoid creating Dhar by casting it on them but not yourself.
-[X] Leave the Sea Guard behind (and Eöl with them). They won't be as suited to the thick woods as the Swordmasters, nor as familiar with Chaos' hidden enclaves and what it takes to root them out, and a group of ten will hopefully be quicker and quieter than a group of thirty.