With no offsides, the back line has to communicate well. Even better, your keeper should be calling out the unmarked and the runners.
Sub often. Early on, press backline hard. You'll spot the guys uncomfortable on the ball within a few minutes, and then take dead aim at those poor souls.
Also, because this happened just last night...we're down 3-2 with just under 5 minutes to go. Our left mid takes a pass inside our half with a defender right on his heels, so our guy can't turn, dribbles back towards goal. The defender sticks his leg in from behind and both guys go down. The Ref plays advantage because the ball rolls to our left back. So as our guy scrambles up, he gives the defender a shove to the chest, and the defender pulls my guy down. Now the whistle comes out, free kick to the other team on the corner of the box. My guy loses his shit and gets a yellow for yelling at the Ref. That sets off a scrum of pushing and chest bumping between the teams, but after things cool down and 2 minutes burn off, we're ready to restart. My guy joins the wall and calmly tells the Ref, "I'll fuck you. I'll fuck your mother, you stupid fuck." Red, game over.
So my advice is don't do that.