Alright, here's what I found. Keep in mind i'm not very good at buffering or doing things the best/fastest possible. On Jiggs, up b isn't guaranteed but it's a very good idea because unless the airdodge right away or jump you will hit them with the tip. On Ivy I couldn't get anything. On Squirtle I could chain grab but Leaf is a good mix up. On Olimar Vine Whips in not guaranteed, you have to run up and they will probably get out of it. And on Wario there is no way to sweetspot the vine whip that I know of, he is too low after the GR. You can also try Razor Leaf on him but it's not a very good mix up and if he comes at you with an aerial you'll get hit. Two other mixups are bullet seed which is really hard and risky and also F-smash which I didn't test.