Where you thinking of using Columbus for bittering & flavor with Citra for aroma? Using a ‘common’ timing for hops (flavor @ 15, aroma @ 5)? Dry hop? whirlpool? FWH?
I haven’t tried searching the forum history for ideas, but there have been a couple of recent threads that I’ve been following. When to add flavoring hops? has ideas that may help (you probably have seen it has well, but the link is also for future readers / searchers). @flars had a ‘new to me’ approach for hops here, @sneezles61 and @jimrmaine also had good observations.