Mega swampert + ?? Team (want suggestions)

Hi all, I originally built this team with the intention of having arch and scarf staraptor in the lead to either u turn into peli to switch in rain after mega or to nuke my opponent’s mega lead with final gambit. Then I’ve got mega swamp in the back to clean.

I kinda just threw sinistcha and drampa to have an alternate trick room mode if I ever run into a matchup I really don’t like with swampert but I feel like my current set doesn’t synergize well with my other mons. Would love suggestions