I found a case for leaving my Strata Premier card in my collection. Tried to book a multi-city flight on Citi Travel only to find that they don't support multi-city itineraries and will only recommend booking a series of one-way flights. Unfortunately, it won't work for me because the international multi-city trip I found cannot be replicated through a series of one ways and can only be found under a single itinerary.

So I'll have to just book it via the airline directly on my Strata Premier card and get 3x points through there, forgoing the 6x points on the portal. TBH, I find the Strata Premier card the more flexible option for now.