this team is fundamentally different than mine, though if you're solely interested in tar drill then fwiw i dont like z drill + rapid spin. if youre spinning with drill i think you should run balloon to avoid spikes and give you more opportunities to get the spin off or leftovers is another solid option. with sd/toxic and sand rush you have tools to distinguish yourself from treads. it also makes the z sets much more threatening having rock slide to threaten mons like zapdos/moltres who otherwise wall z steel. so my advice would be to find different removal with z drill or make drill your spinner, dont have him be both.
as for the team i sent, i did have zama c in mind while building but i imagine you could swap zama c->h for a similar effect. id try to see how roar works here asw. other than that maybe sd jet shifu>zama-c to help with volc, prob eq>toxic/dtail on chomp for mdiancie.