Good work on keeping the weight off, especially considering your past. Sometimes the hardest battle is maintaining the weight loss - it also takes awile for your body to change it set point at a lower weight and reach homeostasis at the lower weight. The reason losing weight slower is better for long term results is because your body slowly gets used to and adjusts to lower weight over time - instead of a sudden dramatic weight loss which the body perceives as a threat and tries to get you back to the weight it was comfortable at. Thats why sometimes when you lose weight fast you are very hungry, tired and miserable (body wanting you to eat more, move less, and hormones out of wack). Although fast fat loss or body changes is very motivating and i would prefer to lose it fast too - but you have to be very observant and disciplined with the compensatory reactions from your body - until it has accepted the new lower weight.

I always say - get as far with your body as you can with good nutrition and exercise - when you hit a plateau or feel like you are not progressing any further - then you can throw in the fasting tool. You want to keep these things up your sleeve so when you are struggling with the last 5 - 10kg you have another tool to throw in and shock your body with (body gets used to regime quite quickly and responds very well to new stimulus). You dont want to be using all of your tools and plateau before your goal weight  - with nothing else to throw at your body. Fasting is a good tool for this!

When you are at your goal weight you might then want to reduce the fasting to maybe once a week for instance just to maintain - or even see if you can get away with none at all (see what your body does). Like I say, you dont want your body getting too used to any set regime like fasting tuesday and friday - change it up - stop it for awhile, see what happens etc - test how your body reacts.