The only guide i know of that talks about using tennokai in an exalted weapon build is one for Wukong's stick
Garuda's and Valkyr's Claws can be treated like normal melee weapons when it comes to building them and adding tennokai into it
Only real stand outs would be Excal's Exalted Blade and Baruuk's Desert Wind as im pretty sure the waves that come off can't trigger tennokai, but the actual hit with the sword/fist can so probably not worth including tennokai in those builds, unless i'm wrong.