ECA doesn't work for me because I drink too much caffeine to have any effect.
The thing on a cut is that cardio can burn up muscle and make you wind up looking soft.
If the diet is really tight, cardio can be reduced to 3 times a week for about 15-20 minutes.
A cut and not loosing muscle is nearly impossible.
My best prep ever for competing was dieting for 10 weeks for a show, then 2 more weeks for another show.
I went from 19% bodyfat to about 8% in that time, and did cardio only twice. And it was lame cardio too, just walking with my friend.
So my point is, if you keep your lifting volume based and your diet super tight, you can focus on those things to make you cut.
Volume lifting will get your heart up and burn more calories. Also, you won't be mentally freaked out by not getting big heavy lifts...which, face it, is hard to do on a calorie deficit anyway.