I usually stick to the first goldsea swords area until my wolf and its companion are level 5, then switch to the second icerun swords area and use the owl encounters to get to level 10.
I got some really helpful advice from Alanna about leveling multiple wolves at once so I'm going to share it here for you!
"When leveling a full set even without a level 10 to carry and crazy comps you can go to icerun 2nd sword start there till majority are level 3-4 with one being 6-7. After that switch to icerun, murkwood, or goldsea 3rd sword and finish everything off there. As long as you are beating the base 3 mob team you are going to get better than sword 2 because even though you do get the boss encounter it shows up so much less than the trinket encounter that you amount of time you see the 3 pack overcomes the loss from boss over trinket encounters."