I've been maintaining since August (after I beat my target weight by 1kg) & have a really simple strategy:
Monday & Thursday are always potential fasting days but ONLY if I've gone up to or above 63,8kg. If I'm still at 63,3kg or below then I 16:8 instead (after all I don't want to carry on losing!)
As you can tell, I'm a daily weigher, unfortunately that's the only way I can be sure to be in control