I’m not sure what’s already in MX274, but judging from my own experience at feeling smitten, the EST and plenty of Instant Honesty would be hard to beat.
You might amp them up with some MEO-EST, Instant Openness and P86.
We men are pretty visual and P86 hits us right in the eyes. P86 with Instant Honesty will really do a number on my heart and soul.