I found the wolves pretty easy. Here's my general strategy for that entire section of the game.
Run a balanced-ish (some level 2s, some level 4s, some of each class etc) team and all the elites.
This was my setup. Give almost all your girls the best Dark runes you can, and your guys a balance of Bert, Warcry etc. Scatter a few random utility runes as well in case they come in handy.
Then, pass turn 1, and wait. Only play a unit if they would otherwise attack you next turn (so as to let them stack up), then try to clear their board using as few units as possible. You'll often get a 2-for-1, with the unit killing one enemy, and the dark rune killing another. Never play out a unit unless you need to to protect your face (sometimes it's even worth taking some face damage to get a better trade next turn). You should only have 1-2 units out at a time, so once they use their special, you can effectively afford to sacrifice them - or protect them with your own special. Also remember to use your more expensive units first where possible, so that if you need to protect all three lanes at once later on, you can. Eventually, they'll run out of units, and you just send in whatever you like to take them out. By the end, I had a good 4-5 units left over while they had nothing for all of the last few levels.
Here's an example from the final level currently available. Naturally, this also makes it absolutely trivial to get your capture-4 quest done.
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