[Update Nov 6th, 2020]
I saw a new strategy and thought I would share. My opponent had got the passive treasure where Deathrattle triggers instantly. They then had Wax Rager (another treasure) and used their ability to target Wax Rager to summon multiple copies. It was brilliant. See Screenshot.
[Original Post Nov 4th, 2020]
I have found this setup almost always wins the first round. After the first round, it's all about the treasure and added cards you get. One of the best passive treasures I have found for Warriors in the Attack = Health as card like Armorsmith, Hellscream, etc. benefits nicely. If you have other warrior strategies please share in the comments.