My advise would be to go heavy hitters vs levi.
Taking weaker models means levi can quickly kill them and turn them into abominations. Levis killing is great because it cuts through defensive stuff, but the damage itself isn't fantastic. So high wound count models, plus healing are a good choice.
Also, bring Aionus. It's a pretty unfair thing to do, but if wyrd made him, they clearly think hard counters are fair play. Don't worry about needing to out activate them, levi tends to activate first because if he takes hits he can't channel as well.
I also wouldn't worry about actually hunting the waifs, if you do you're not doing schemes. Just act like you can, forcing him to keep them in sub optimal locations, meaning levi has to spend an ap moving.
Accept the fact that a good chunk of your force will die. Count on it, plan on it. Have them focus down your dudes while you do schemes. Just don't take it to the extreme and let everything die turn 2-3 lol.