I've noticed something that I call injury period. Last time it happened last season. It is period of few days when my players are costantly getting injured, every day at least one, sometimes 2. I have developed my own strategy to sacrifice 1 injured player on whole team for later health of other players. So if 1 of my players gets injured for 1-2 days, I don't heal him. This saves me lot of red packs which I spend during "injury period" and even then I have lack of red packs. My only option is buying, but impossible with 35T. I have secure supply of all packs every day (a lot of friends...)