Work your lats from every angle, with different movements and change the rep range often. No easy way to happiness: for example I've done workouts where you start with 10x10 bent over rows or cable seated row. Gives you great pump and works especially on the muscle: you can hardly cheat on this cause if you start too heavy, you'll get only 7-8 reps or less at the end and it blows the whole idea. So start with moderate weight and work the muscle. After that you'll do snatch grip deadlifts or rack pulls. The impact goes more on your already fatigued back and you can't go so heavy which would cause that you'll ego lift and use more of the other muscles than back.
Also pullover is a great movement, not only for the isolation but also for the impact on rib cage. Bigger rib cage makes waist look smaller and your v-taper more impressive.
And work also the thickness, my examples weren't just for lats. I've seen lots of wide backs but not so many thick so keep in mind that back needs lots of punishment. Throwing in some intensity techniques wouldn't be bad at all.
It is said that competitions are won from the back. Well developed back is like ace in the pocket cause it's hard to build...
Hope your lats keep getting wider, look for the replies here and experiment: keep trying new things because body adapts fast and you gotta be faster to make the changes so you can continue growing.