No, you'll be surprised how much will power has healed me from literally half HP to Full HP this season
Black Cat works surprisingly well against Thing - her AAR prevents his rock stacks from triggering which means when she’s ramped up her sabotage will shred him. Scream has easy armor break so Guardian goes down quick. Titania vs Peni is the only one that would be tricky and Peni’s not awakened so they’d have Willpower for healing, they’d just have to play carefully while her shield is up.