I don't really think anyone is going to have trouble killing the Wolf at lvl 55, especially because the mission is open to public lobbies, but Ash with his Seeking Shuriken augment make this fight extremely easy to do. If you don't have Ash/Seeking Shuriken, use any Warframe that can go invisible and a melee weapon compatible with Shattering Impact (Sarpa/Vastilok work well with Shattering impact) to strip armor/Unairu's Armor strip ability.
If you are using Ash, you only need enough power strength for Seeking Shuriken to fully strip armor, the rest of your build would be duration/efficiency and any other QOL mods you like to run.
Take a high damage, Crit based weapon and mod it for Blast (+75% damage to Machinery) and/or Electric (+50% damage to Machinery).
Use Seeking Shuriken to strip the Wolf's Armor and stay invisible to avoid the constant knockdowns/wolf charging around the map.
*If anyone is trying to get the Saturn Six Mask drop for some reason, you have to actually walk over it to pick it up, Vacuum won't gather it for you. (Should have a green flair if you're trying to mark it for your squad).
Ash can also run high strength with his Fatal Teleport augment, with a weapon with good finisher damage (like a hammer or dagger). Run over, press 3, bop! Can even skip the armour stripping step
I thought he would be immune to Fatal Teleport like the Thrax. Good to know he isn't, and using Savage Silence seems to boost damage enough that you don't need to deal with gaining combo either, even with base power strength.
Before you can do that, you have to finish Nihil...and I HATE this "fight". I can only try for 5 min, die twice and rage quit. Come back a day later, rince and repeat.