Hmm… not too sure what you mean by “what do I use”…my hands??
Sometimes I actually go frame by frame or use the Puppeteer and animate2 to animate. Sometimes I use marketplace content, like Kubold’s anims or SKA’s. Ultimately, as long as I get to tell my story the way I’d like to, ko re de ii (Japanese for any way is fine - literally ‘this is it’).