10-way split subject line testing

Has anyone setup a 10 way subject line split within a canvas and also set up an "auto-select" where each subsequent challenger is selected automatically using winning path? There's limitations where we can only use up to 4 splits for experiments paths and if I were to use audience path, there's a limitation up to 8. I can build on top of one another but I want to ensure the winning path is auto selected and sent. Is there an easy way to handle this request in Braze?