I had 14 Health Packs when I entered the PVP. I used a champed Lady Thor, 1 4/43 Moon Knight and a champed Iron Man Mark 40.
In about twenty minutes, I got to 18 wins before I ran out of Health Packs.
I like that a win won't be taken away from me. I haven't worried about a top placement in PVP for a long time. I found it to be too stressful and frustrating. So, this system works for me.
What will be a problem going forward, I think, is the speed of getting to 22 wins. I think most of us like to use one team for most of the event. If that's the case , then, unless I get lucky with some quick Iron Man yellow matches, I'm going to get three wins every time my ten health packs recharge. That's going to be a pretty long grind to get to 40.