How long do you do diet breaks/how often do you do maintenance phases?

27F, 5’0 SW 155, CW:138, GW:125 I’ve done through several phases of fat loss of 12 week deficits of 250 calories followed by maintenance phases of 6 months after that. I’m working with a dietitian/ macro coach that recommends doing cycles of this for sustainability but I’m getting married in August and really was hoping to lose some more weight, wondering how often you all do diet breaks or maintenance phases.

My last cut was Jan-April (1500 cals) and have been in maintenance (1800)since.