Seems you have several options available...
If the drink HAS to be wine as opposed to something lower synned then you can either have low/free syn meals/snacks during the day and keep all your daily syns for wine - but ensure you stick to your maximum 15 syns;
OR you could have it as a spritzer, little wine topped up with diet lemonade which is syn free then you get a better return in terms of amount of drinks compared to syns used;
OR you could hunt around for the lowest syn wine you can find and stick to that;
OR you can cut down the amount of days you have the wine, every other day maybe, or just at the weekend, and do a bit of flexi-synning.
But if the wine isn't as important as the company you are keeping then just switch the wine out for something syn free - any diet fizzy drink, any sugar free squash, etc and keep the extra syns for your food during the day.
Ultimately if you want to lose weight you'll need to stick to plan, and to stick to plan you need to do something.
And more importantly, if you are relying on your drink of wine every night and can't go without it there is a good chance you have a problem with the drink anyway and need to be seeking help on that front too.