[Callers] Building to Contra Corners

Hi all, first time posting here! I'm new-ish to calling and I've yet to call contra corners. I think I'm up for the challenge and could teach the figure itself, but I still think it's a tricky one for dancers in all but the most experienced crowds. A few callers I know have advised me to build up to a challenging figure like contra corners over the course of an evening by calling dances that echo the skills the dancers will need later. With that in mind, what dances would you call early in the evening in a mixed-level group that would help "teach" dancers the skills they need to be successful at contra corners? I've been thinking I should include an easy proper-ish dance, and maybe a dance with allemandes outside the minor set... anything else come to mind? Thanks in advance, Hannah Chamberlain Westbrook, ME