tackle!?
so, given what you currently have on your team, i'd recommend swapping out either spiritomb, vileplume, or both. either klinklang (if you evolve klink) and leavanny (if you evolve swadloon) would make decent replacements. your team would lose ghost typing, but given that the only thing spiritomb has in that department is Ominous Wind you probably won't be missing out too much.
i know klinklang is good from personal experience, and i think some people like leavanny, but i'd really recommend lilligant, too. sleep powder + quiver dance + energy ball will 6-0 a lot of leaders.
edit: ahh yikes i didn't know other people said things.